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Apple Leaf Senescence: Leaf Disc Compared to Attached Leaf

机译:苹果叶片衰老:叶盘与附着叶相比

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摘要

Attached apple leaves (Pyrus malus L., Golden Delicious) began to lose protein in early August as the first sign of senescence. Apple leaf discs prepared from samples before early August gained protein for up to 7 days after detachment. After early August, the loss of protein from leaf discs was no greater than the loss from attached leaves in 7 days. The loss of chlorophyll from leaf discs began over 2 months before attached leaves began to lose chlorophyll naturally and before leaf discs lost protein. Leaf discs from presenescent leaves did not senesce significantly faster when maintained in darkness instead of 12 hours of light. In general, the loss of protein and chlorophyll from apple leaf discs after 7 days was much less than for most other leaf types studied.
机译:附着的苹果叶(Pyrus malus L.,Golden Delicious)于8月初开始失去蛋白质,这是衰老的第一个迹象。从8月初之前的样品中制备的苹果叶圆片在分离后最多7天内获得了蛋白质。 8月初之后,叶圆盘中蛋白质的损失不超过7天叶附着中的蛋白质损失。叶盘中叶绿素的损失开始超过2个月,之后附着的叶子开始自然失去叶绿素,叶盘中失去蛋白质。在黑暗中而不是在12个小时的光照下,衰老前的叶子圆片的衰老不会明显加快。一般而言,苹果叶盘在7天后损失的蛋白质和叶绿素比其他大多数研究类型的叶要少得多。

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