They were already under stress, thanks to the aftershock of last year's drought.
去年干旱的余波已经给他们造成压力了。
Though plenty of rain may fall on savanna during the year, for at least part of the year little does, creating the drought stress ultimately favoring grasses.
尽管一年中大草原上可能会有大量降雨，但至少有一段时间是降雨很少的，造成干旱压力，最终有利于牧草生长。
The drought stress from jointing to heading stage decreased nitrogen nutrition efficiency of winter wheat significantly.
拔节至抽穗期干旱胁迫极显著地降低冬小麦的氮素营养效率。
Under drought stress, NO and H2O2 probably exerted their regulating effect on ABA synthesis by regulating cellular redox status.
干旱胁迫下NO和H2O2对ABA合成的调节作用可能是通过调节细胞氧化还原状态进行。
It was lightly influenced by bulk of reserved water adjustment in drought stress, but the absolute reserved water adjustment was depended on SAP flow, which influenced by soil water conditions.
干旱胁迫对贮存水调节量的影响不显著，但是绝对调节能力随干旱胁迫程度的增加而增加。
The effects of drought stress on leaf senescence after heading and yield were investigated.
研究干旱逆境对水稻抽穗后叶片衰老和产量的影响。
Under soil drought stress lamella structure of chloroplast wrenched obviously and there was a black area, which had high electron density in the middle of chloroplast.
在土壤干旱胁迫下，叶绿体的片层结构发生严重的扭曲并在中央部分形成电子密度较高的黑色团块物质。
It was found that plant has adapting phenomena in drought stress, which means that plant has adapting ability to suit drought.
发现了植物对干旱胁迫的适应现象，即植物体有干旱胁迫的自动适应和调节能力。
The results showed that the interaction of doubled CO2 concentrations with drought stress reduced the water consumption and transpiring rates of the saplings effectively.
结果表明，在各干旱胁迫水平下，CO2浓度倍增有效地降低了幼树的蒸腾耗水量和耗水速率。
Nongda 15440 can keep the higher dry substances accumulation at drought stress and had stronger resistant ability to drought stress, but Nongda 15404, 15416 had more sensitivity to drought stress.
在干旱胁迫下，15440仍能保持相对较高的干物质积累量，对干旱胁迫有较强的抵抗能力，而农大15404、15416对干旱胁迫反应更为敏感。
The distribution of pinitol in the masson pine seedlings and changes of pinitol content in needles of seedlings from different provenances under drought stress were studied.
对马尾松苗木中松醇的分布及干旱胁迫下不同种源马尾松苗木针叶内松醇含量的变化进行了测定。
It was observed and discovered under electronic microscope that the effects of drought stress on surface ultrastructure of pollen and filament were quite obvious.
电子显微镜下观察发现：干旱胁迫对玉米花粉和花丝表面超微结构均产生了明显的影响。
Drought stress proteins are heat stable, therefore the heat stable HSPs (HSP s) are possibly related to drought resistance.
干旱逆境蛋白是热稳定蛋白，因此热稳定蛋白可能与抗旱性有关。
But soil drought stress increases CPT concentration in the leaves, stems and roots of the seedlings.
土壤干旱胁迫明显提高了喜树幼苗根、茎、叶中的喜树碱含量。
Four stone fruits cell membrane injury rate were ascending tendency under drought stress, and resumed after irrigating.
干旱胁迫下四种果树细胞膜伤害率都呈上升趋势，复水后恢复。
The changes rules of endogenous phytohormones in Citrange and Shanxiahong under drought stress were studied.
研究了干旱胁迫下枳橙和山下红密柑内源激素含量的变化。
Under soil drought stress conditions, drought - resistant varieties (species) accumulated comparatively higher free proline content than those in the less drought - resistant varieties.
土壤干旱胁迫导致游离脯氨酸大量累积，抗旱品种(种)比不抗旱的累积量要大。
Elongation growth and basal growth are decreased gradually, and first elongation growth is restrained under drought stress in laboratory.
室内干旱胁迫条件下，臭柏的伸长生长和地径生长逐渐减少，而且伸长生长优先受到抑制。
Drought stress not only affected the development and yield of maize, but also affected the grain quality.
干旱胁迫不仅影响玉米生长发育和产量，而且影响了玉米的子粒品质。
However, drought stress strongly restricts maize production in most arid and semi-arid areas.
但是，在干旱与半干旱地区，水资源短缺一直制约着玉米产量的进一步提高。
Under drought stress condition, rooting percent is smaller than that of intermediate water supply treatment and flooding treatment.
干旱胁迫条件下，插穗生根率不如中等供水处理和淹水处理。
NO and H2O2 could lead to the cellular transition towards oxidative status by simulating the effect of drought stress, and they could also increase ABA accumulation in wheat leaves.
NO和H2O2能模拟干旱胁迫的作用使细胞状态向氧化型转变，还可以使小麦叶片aba积累量上升。
The water physiology of locust seedling under conditions of different drought stress was tested.
对不同土壤干旱条件下刺槐幼苗水分生理和生长指标进行了初步研究。
Drought stress and the strong light stress haa significant effects on chloroplast membrane protein expression.
干旱胁迫和强光胁迫对叶绿体膜蛋白表达具有显著的影响。
With the research of chlorophyll fluorescence parameters may reflect the energy utilization in photosynthetic reaction center and changes of biological activity when the plants under drought stress.
结合叶绿素荧光参数的研究，可以反映出当植物受到干旱胁迫时，光合反应中心的能量利用情况和生物活性的变化。
Despite less sensitive to mild drought stress in jack pine than in black spruce, stomata was more sensitive to moderate and severe stress in jack pine than in black spruce.
尽管北美短叶松的气孔对轻度干旱胁迫不如黑云杉敏感，但是它对中度及严重干旱胁迫的敏感程度却高于黑云杉。
Water had greater effect on MDA content than fertilization and copper, and drought stress obviously increased the MDA content and MDA/SOD values.
水分对MDA含量的影响大于铜污染和施肥，表现为干旱可显著增大叶片MDA含量，并使MDA/SOD值增大；
There were some correlations between the changes of the bands and the extent of drought stress, but their orderliness was not remarkable.
同工酶的谱带可归为四类，谱带的变化与干旱胁迫程度有一定相关，但规律不明显。
The changes of chlorophyll content in the leaves of both Brazilian upland rice and normal rice varieties after drought stress were not obvious.
干旱胁迫后不同水陆稻品种叶片中叶绿素含量变化均不明显；
Drought stress is a bottleneck factor for plant growth and development .
干旱胁迫是影响植物生长发育的主要因子。
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