4 thoughts on “What are the characteristics of ginkgo tree leaves”
Richard
Ginkgo, commonly known as ginkgo trees, also calls it Gongsun Tree, Duck Foot Tree, Thousands of Trees, and Living Fossils. The so -called duck feet tree is because its leaves are like open duck palm. The so -called "Thousand Fan Trees" is because of the leaves of ginkgo, it looks like an open fan. The so -called living fossils, because of its early origin, most of the similar species have disappeared, and it still exists, like the reserved activated stone. On a tree, a fan -shaped leaves are hung. In the autumn, the leaves become golden yellow and extremely beautiful, so Americans call it a "golden thousand -fan tree" or "golden fossil tree". The leaf shape of ginkgo biloba is also affected by the angle of the angle of the blade base. Observe the leaves of a group of real trees carefully. It can be found that the base shape of ginkgo leaves has changed greatly, from arc, triangle to arrow -shaped. This is related to the degree of development of Ye Paracel, and different varieties are also obviously different. Generally, the eldest son -type and bergamot types are often close to the triangle; while the nucleus and longan types are often greater than 180 degrees on both sides of the leaf base, which are arc. Essence The ginkgo leaf surface, rough look is not divided into positive and negative, in fact, the front and back of the ginkgo leaves are also obviously different. The front of the ginkgo leaves is dark green, shiny, generally hairless, and its back is pale green, with a large number of fluff or cilia, only a few hairlessness. For a long time, the color tends to be silver and white. The ginkgo leaves generally have a deeper crack in the middle, which divides the leaves into two halves. Every half, there are generally 2-4 shallow cracks. The depth and quantity of ginkgo leaves are related to species, varieties, gender, age and growth conditions, management measures, etc. Generally, the cracks of the male tree leaves are deeper, and the fissure of the female trees is shallow; the cracks of the young tree leaves are deeper, and the cracks of the adult tree leaves are shallow; The leaf cracks are deeper, and the leaf cracks of the trees and parts of the gangs are shallow. Some people have used the depth of the middle crack as the basis for judging the gender of ginkgo male and female. This method is unreliable. Because, the growth of the tree -based parts has a very strong growth, the leaves are also deeply engraved, and the cracks are deep. Ginkgo biloba leaves, generally 5.0-5.3 cm long, up to 8 cm in length; generally 7.0-8.5 cm wide, and the widest is 11.5 cm. The area of each blade is 4.0-32.0 square centimeters. The size of the leaf area is related to the strength of the tree. Excessive sturdy, when the tree is weakened for various reasons, the single leaf area will be greatly reduced, and the number of leaves on each bell branch will also decrease, and even leave the leaves in advance. Therefore, the number of leaves on each bell branch, the average area of the leaves per leaf, and the sturdy plant's leaves fall off sooner or later, can be used to determine whether the plant can bloom normally the second year. Taking the Taixing Buddha's finger as an example, if there are more than 6 leaves on the bell branch, the leaf area is normal, and the leaves can be preserved until early November. Generally, the second year can still be urged. The leaf veins of ginkgo leaves are expanded outward in a two -dimensional branch. The number of branches is generally 3-4 times. Arnott H.J. (1959) carefully checked thousands of ginkgo leaves and found that about 10%of the leaves can be seen in the phenomenon of leaf veins. He also divided the leaves into four types according to the number of branches and the fusion of the leaf veins. The minority combination phenomenon on this leaf vein is considered a phenomenon of ancestral return, because this structure is similar to that of certain fern and Soviet -rail. The petiole of ginkgo leaves is actually a vascular bundle group formed by many leaf veins. Generally 5.5-7.0 cm, up to 12.1 cm, and the shortest of only 2.0 cm. The leaves born on the same bell branch not only have different leaves in shape, but also have a large difference in the area of the single leaf, and the length of the petiole has also changed a lot. Here, in addition to the impact of growth conditions, it is also related to the variety. The epidermis of ginkgo leaves has obvious stratum corneum. The stratum corneum consists of two long cells. On the leaves, there are many dark line -like grooves distributed. The epidermal cells that are parallel in the leaf veins and the leaf veins are small and narrow, and the arrangement is closely arranged. The cells in the two veins are long and wide, inlaid tightly, and arranged neatly. The upper epidermis of the leaves does not have a pores, or only a small amount of incomplete stomach. There are many pores below, and the cells are depressed, often ovate or spindle -shaped. There are 5-7 auxiliary cells, which are surrounded by a ring with smooth or hairy surface. The lower epidermis of the leaves consists of many irregular waveform flat cells. The epidermal cells have a dense tooth protrusion at the contact at the point of contact with each other. Below the upper episode is a grid -like tissue, consisting of a long grille -shaped tissue cells with a tightly arranged strip. The cells contain more chloroplasts. Sponge tissue is composed of irregular circular cells and also contains more chloroplasts. This leaf slices to resist various pathogenic bacteria have strong ability. This is also an important reason for the existence of ginkgo that can continue to exist for 2000 million years. Moisturizing some germs on the ginkgo leaves. Although they can germinate and form acetic network, it is difficult to penetrate the stratum corneum of the ginkgo leaf surface to infringe its tissue. Instead, the cell wall of ginkgo leaves will be thickened accordingly. This thickening phenomenon occurs when the veins are damaged by mechanical damage. This effectively prevents the invasion of pathogenic bacteria. In addition to the prevention mechanism of the leaf surface structure, the polyethylene and various organic acid contained in the blades also have obvious bacteriostatic insecticide effects.
Surface: 1. The leaf shape of the ginkgo is also affected by the point of view of the two ends of the leaves. Observe the leaves of a group of real trees carefully. It can be found that the base shape of ginkgo leaves has changed greaterly, from arc, triangle to arrow -shaped. This is related to the degree of development of Yehara, and there are significantly different types. Usually the type of the eldest son and bergamot, the leaf base is close to the triangle to the tent; while the nucleus type and longan type, the angle of the two ends of the leaf base is often greater than 180 degrees, which is arc. Only waist. 2. Ginkgo leaf surface, rough viewing is not divided into positive and negative. In fact, the front and back of the ginkgo leaves are also significantly different. The front of the ginkgo leaves is dark green, luster, usually hairless, and the opposite side is pale green. There are many fluff or cilia, as long as a few hairlessness. For a long time, the color tends to be silver and white. Enthusiastic: 1. Ginkgo leaf contains reckless oxalic acid, ginktthal flavonoids, heterotic bislavoids, alcohol, etc., used to treat hypertension and coronary heart disease, angina pectoris, cerebrovascular spasm, and high serum cholesterol. Effect. 2, ginkgo leaf preparations have a good curative effect for the treatment of diabetes, which can be used for auxiliary drugs for diabetes. 3, ginkgo and ginkgo leaves are used to make healthy pillows, which can improve human breathing, improve sleep quality, and long -term use can prevent and treat cardiovascular disease. Preventing high blood pressure, stroke, diabetes, etc. caused by adults due to blood vessels and turmoil can make adults maintain normal cardiac output and normal nervous system functions, especially in middle -aged and elderly people. Cell life cycle
Pay content for time limit to check for freenAnswer the characteristics of ginkgo leaves: 1. The color of the ginkgo leaves is light green, which is composed of blades and petioles. The top of its leaves also has a large wave, which looks like a fan as a whole. 2. Ginkgo leaves are large trees, 30 to 40 meters high, all -plant -free, chest diameter can reach 4 meters, young tree bark is nearly smooth, light gray, big tree skin gray -brown Slow -like spacing branches of branches and growth. 3. Leaf alternate, radiates on the long branches, is scattered on the long branches. On the short branches, there are 3 to 5 clusters, with slender petioles, fan -shaped, pale green on both sides, and the wide top edge is lacking or 2 cracks. 5 ～ 8 (～ 15) cm wide, with most fork -shaped and Diaopa fine pulse. 4. Driver, sparsely strain, the ball flowers are single in the axillary of the short branches; the male ball flowers form a flowering sequence, and the majority of the stamens are 2 flowers. (Learn 3 to 5 forks), the fork end 1 has a beads with a plate -shaped bead beads, and often a beads develop into development seeds. Seed maturity period from September to October.
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Ginkgo, commonly known as ginkgo trees, also calls it Gongsun Tree, Duck Foot Tree, Thousands of Trees, and Living Fossils. The so -called duck feet tree is because its leaves are like open duck palm. The so -called "Thousand Fan Trees" is because of the leaves of ginkgo, it looks like an open fan. The so -called living fossils, because of its early origin, most of the similar species have disappeared, and it still exists, like the reserved activated stone. On a tree, a fan -shaped leaves are hung. In the autumn, the leaves become golden yellow and extremely beautiful, so Americans call it a "golden thousand -fan tree" or "golden fossil tree".
The leaf shape of ginkgo biloba is also affected by the angle of the angle of the blade base. Observe the leaves of a group of real trees carefully. It can be found that the base shape of ginkgo leaves has changed greatly, from arc, triangle to arrow -shaped. This is related to the degree of development of Ye Paracel, and different varieties are also obviously different. Generally, the eldest son -type and bergamot types are often close to the triangle; while the nucleus and longan types are often greater than 180 degrees on both sides of the leaf base, which are arc. Essence
The ginkgo leaf surface, rough look is not divided into positive and negative, in fact, the front and back of the ginkgo leaves are also obviously different. The front of the ginkgo leaves is dark green, shiny, generally hairless, and its back is pale green, with a large number of fluff or cilia, only a few hairlessness. For a long time, the color tends to be silver and white.
The ginkgo leaves generally have a deeper crack in the middle, which divides the leaves into two halves. Every half, there are generally 2-4 shallow cracks. The depth and quantity of ginkgo leaves are related to species, varieties, gender, age and growth conditions, management measures, etc. Generally, the cracks of the male tree leaves are deeper, and the fissure of the female trees is shallow; the cracks of the young tree leaves are deeper, and the cracks of the adult tree leaves are shallow; The leaf cracks are deeper, and the leaf cracks of the trees and parts of the gangs are shallow. Some people have used the depth of the middle crack as the basis for judging the gender of ginkgo male and female. This method is unreliable. Because, the growth of the tree -based parts has a very strong growth, the leaves are also deeply engraved, and the cracks are deep.
Ginkgo biloba leaves, generally 5.0-5.3 cm long, up to 8 cm in length; generally 7.0-8.5 cm wide, and the widest is 11.5 cm. The area of each blade is 4.0-32.0 square centimeters. The size of the leaf area is related to the strength of the tree. Excessive sturdy, when the tree is weakened for various reasons, the single leaf area will be greatly reduced, and the number of leaves on each bell branch will also decrease, and even leave the leaves in advance. Therefore, the number of leaves on each bell branch, the average area of the leaves per leaf, and the sturdy plant's leaves fall off sooner or later, can be used to determine whether the plant can bloom normally the second year. Taking the Taixing Buddha's finger as an example, if there are more than 6 leaves on the bell branch, the leaf area is normal, and the leaves can be preserved until early November. Generally, the second year can still be urged.
The leaf veins of ginkgo leaves are expanded outward in a two -dimensional branch. The number of branches is generally 3-4 times. Arnott H.J. (1959) carefully checked thousands of ginkgo leaves and found that about 10%of the leaves can be seen in the phenomenon of leaf veins. He also divided the leaves into four types according to the number of branches and the fusion of the leaf veins. The minority combination phenomenon on this leaf vein is considered a phenomenon of ancestral return, because this structure is similar to that of certain fern and Soviet -rail.
The petiole of ginkgo leaves is actually a vascular bundle group formed by many leaf veins. Generally 5.5-7.0 cm, up to 12.1 cm, and the shortest of only 2.0 cm. The leaves born on the same bell branch not only have different leaves in shape, but also have a large difference in the area of the single leaf, and the length of the petiole has also changed a lot. Here, in addition to the impact of growth conditions, it is also related to the variety.
The epidermis of ginkgo leaves has obvious stratum corneum. The stratum corneum consists of two long cells. On the leaves, there are many dark line -like grooves distributed. The epidermal cells that are parallel in the leaf veins and the leaf veins are small and narrow, and the arrangement is closely arranged. The cells in the two veins are long and wide, inlaid tightly, and arranged neatly. The upper epidermis of the leaves does not have a pores, or only a small amount of incomplete stomach. There are many pores below, and the cells are depressed, often ovate or spindle -shaped. There are 5-7 auxiliary cells, which are surrounded by a ring with smooth or hairy surface. The lower epidermis of the leaves consists of many irregular waveform flat cells. The epidermal cells have a dense tooth protrusion at the contact at the point of contact with each other. Below the upper episode is a grid -like tissue, consisting of a long grille -shaped tissue cells with a tightly arranged strip. The cells contain more chloroplasts. Sponge tissue is composed of irregular circular cells and also contains more chloroplasts.
This leaf slices to resist various pathogenic bacteria have strong ability. This is also an important reason for the existence of ginkgo that can continue to exist for 2000 million years. Moisturizing some germs on the ginkgo leaves. Although they can germinate and form acetic network, it is difficult to penetrate the stratum corneum of the ginkgo leaf surface to infringe its tissue. Instead, the cell wall of ginkgo leaves will be thickened accordingly. This thickening phenomenon occurs when the veins are damaged by mechanical damage. This effectively prevents the invasion of pathogenic bacteria. In addition to the prevention mechanism of the leaf surface structure, the polyethylene and various organic acid contained in the blades also have obvious bacteriostatic insecticide effects.
Surface: 1. The leaf shape of the ginkgo is also affected by the point of view of the two ends of the leaves. Observe the leaves of a group of real trees carefully. It can be found that the base shape of ginkgo leaves has changed greaterly, from arc, triangle to arrow -shaped. This is related to the degree of development of Yehara, and there are significantly different types. Usually the type of the eldest son and bergamot, the leaf base is close to the triangle to the tent; while the nucleus type and longan type, the angle of the two ends of the leaf base is often greater than 180 degrees, which is arc. Only waist.
2. Ginkgo leaf surface, rough viewing is not divided into positive and negative. In fact, the front and back of the ginkgo leaves are also significantly different. The front of the ginkgo leaves is dark green, luster, usually hairless, and the opposite side is pale green. There are many fluff or cilia, as long as a few hairlessness. For a long time, the color tends to be silver and white.
Enthusiastic: 1. Ginkgo leaf contains reckless oxalic acid, ginktthal flavonoids, heterotic bislavoids, alcohol, etc., used to treat hypertension and coronary heart disease, angina pectoris, cerebrovascular spasm, and high serum cholesterol. Effect.
2, ginkgo leaf preparations have a good curative effect for the treatment of diabetes, which can be used for auxiliary drugs for diabetes.
3, ginkgo and ginkgo leaves are used to make healthy pillows, which can improve human breathing, improve sleep quality, and long -term use can prevent and treat cardiovascular disease. Preventing high blood pressure, stroke, diabetes, etc. caused by adults due to blood vessels and turmoil can make adults maintain normal cardiac output and normal nervous system functions, especially in middle -aged and elderly people. Cell life cycle
Pay content for time limit to check for freenAnswer the characteristics of ginkgo leaves: 1. The color of the ginkgo leaves is light green, which is composed of blades and petioles. The top of its leaves also has a large wave, which looks like a fan as a whole. 2. Ginkgo leaves are large trees, 30 to 40 meters high, all -plant -free, chest diameter can reach 4 meters, young tree bark is nearly smooth, light gray, big tree skin gray -brown Slow -like spacing branches of branches and growth. 3. Leaf alternate, radiates on the long branches, is scattered on the long branches. On the short branches, there are 3 to 5 clusters, with slender petioles, fan -shaped, pale green on both sides, and the wide top edge is lacking or 2 cracks. 5 ～ 8 (～ 15) cm wide, with most fork -shaped and Diaopa fine pulse. 4. Driver, sparsely strain, the ball flowers are single in the axillary of the short branches; the male ball flowers form a flowering sequence, and the majority of the stamens are 2 flowers. (Learn 3 to 5 forks), the fork end 1 has a beads with a plate -shaped bead beads, and often a beads develop into development seeds. Seed maturity period from September to October.
n00:00 / 00: 5170% shortcut keys to describe space: Play / suspend ESC: exit full screen ↑: increase volume 10% ↓: reduced volume decrease by 10% →: single fast forward 5 seconds ←: single fast retreat 5 seconds Press hold down and hold it holding up. Here you can drag no longer appear in the player settings to reopen the small window shortcut key description