注目の話題: 自分は47なのに、29の私に女として終わりと言う彼; あまりにも稚拙な旦那にウンザリです; 彼女に敢えて冷たく接すべきか悩みます

science,math and English

No.368　14/01/18 10:43
名無し0 ( 50代 ♂ ) あ+あ-

【Why colored leaves 紅葉 happen?】

Leaves of some plants turn into red or yellow in fall.We call it the colored leaves in general.Mechanism of changing colors is a little different concerning the next two.Changing into red or yellow.😃

Leaves of a maple or dogwood 花水木 turn into red in fall when temperature goes down,for chlorophylls in the leaves are resolved,its color of green disappears.💨

Then supplying water for the leaves decreases.Grape sugar is produced in the leaves.It's sent to its roots and stems through its 師菅,but the 師菅 is cut down.I'm going to express its detail in the future.[ｸﾛｰﾊﾞｰ]

As the result,the grape sugar remain collected in the leaves.Red pigment,アントシアニン is made from the grape sugar.🍁

As for yellow leaves like ginkgo 銀杏,its chlorophylls are resolved,and its color of green vanishes like colored leaves,but the アントシアニン is never made.🍁

Vanishing the color of green in the chlorophyll makes yellow pigment,carotinoid,lying originally in the leaves appear clearly,so the leaves turn into yellow.