多胺作为生理活性物质与植物衰老关系密切。
As physiological active materials, polyamines have a close relationship with the senescence of plants.
控制衰老时不管是这种机制还是其他机制在起作用，研究者期待在Arabidopsis中发现的进程在其他植物里也一样。
Regardless of whether this or some other mechanism controls aging, researchers expect that the processes found in Arabidopsis are likely to be conserved in other plants.
幼小植物没有足够大的叶面积进行高效率的光合作用，而较老植物又趋于衰老。
Very young plants do not have sufficient leaf area to carry out high rates of photosynthesis, while older plants are subject to senescence.
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