主茎下部衰老叶片的SOD、POD活性明显降低、叶绿素含量减少、光合作用功能衰退。
SOD and POD activity descended apparently, and chlorophyll contents and photosynthesis declined in senescent leaves of lower stem.
结果表明，在干旱胁迫下，烤烟幼苗植株的生长和光合作用均受到明显的抑制。
The results showed that the photosynthesis and growth were obviously reduced by drought stress.
结果发现，天然芸苔素内脂可以明显提高大扁杏的叶绿素含量，提高光合作用强度，增强大扁杏的抗旱性。
The result found that NBR could improve the content of chlorophyll and the rate of photosynthesis of apricot, increase drought resistance.
作物光合作用对土壤水分有明显的阈值反应。
There is an obvious threshold response of plant photosynthesis to soil water content.
水稻的光合作用表现出明显的午睡现象，即13时左右(北京夏令时)光合作用出现低谷。
The photosynthesis of rice have a afternoon-nap, which is characterized hy the lowest synthetic rate of the day at 13 o 'clock (Beijing Summer time).
土壤中锰元素对植物光合作用、新陈代谢、促进生长、增强抗病性及其增加产量均有明显的作用。
Manganese element in soil have obvious function to the photosynthesis and metabolism of plant, and can promote growth, strengthen the disease resistance and increase the output.
群体光合作用和衰老特性的差别主要在组合间，而不在两系和三系两种类型之间，两系杂交稻未有明显的优势。
Significant differences were observed within the same kind of hybrid rice but not between the two kinds of hybrids, so did for the canopy photosynthetic rate of these hybrids.
轻度土壤干旱下，小麦叶片仍能维持较好的水分状况，高氮营养对叶片光合作用有明显的促进作用。
The objective of this study was to evaluate the effects of nitrogen nutrition on water status and photosynthesis in wheat under soil drought.
轻度土壤干旱下，小麦叶片仍能维持较好的水分状况，高氮营养对叶片光合作用有明显的促进作用。
The objective of this study was to evaluate the effects of nitrogen nutrition on water status and photosynthesis in wheat under soil drought.
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