Baccata > p . davidiana > p . ussuriensis > a . ginnala . under drought conditions , the ability of p . davidian ' s osmotic adjustment is decreasing , the others are increasing 在干旱胁迫条件下，山桃渗透调节能力减弱，其它三树种渗透调节能力增强。
Under drought conditions , the decreasing degree of transpiration rate and the conduction of stoma is a . ginnala > m . baccata > p . ussuriensis > p . davidiana 在干旱胁迫条件下，茶条槭蒸腾速率和气孔导度降低幅度最大，山荆子、山梨次之，山桃最小。
The results showed , under the stress of continuous drought , the relative water content of leaves had a descending trend , while the penetration of membranes lightly increased 研究结果表明：供试材料在连续干旱胁迫下，叶片相对含水量呈下降趋势，质膜透性有所增加。
The effects of spraying plant growth regulator under drought stress on seedling growth and physiological and biochemical indexes of soybean were studied based on pot experiment 摘要采用盆栽试验，研究了在模拟干旱胁迫下喷施植物生长调节剂对大豆幼苗生长发育和生理生化指标的影响。
The increment of praline content and sod activity in the seedlings raised in organic soil base was more than that in the seedlings raised in nutritional soil base under moderate drought stress 在中度干旱胁迫条件下，有机基质所育秧苗水稻叶片的脯氨酸含量和sod活性增加的幅度大于营养土所育秧苗。
Quality of seedlings raised in nutritional soil base and the metabolism and physiological responses to drought stress under pot cultivation were studied in comparison with those of seedlings raised in organic soil base 摘要以营养土所育秧苗为对照，研究了有机基质所育秧苗的素质及其对干旱胁迫的生理反应。
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。
In this paper , the roles of dehydrins and cbf1 transcription factor were studied in plants under low temperature and dehydration condition , and their possible mechanisms in the development of freezing and drought tolerance were also discussed 本文以植物脱水蛋白和冷诱导转录因子cbf1基因为主要研究对象，探讨它们在低温和干旱胁迫中对植物抗冻性和抗旱性形成的作用。
Acquiring the novel drought resistance genes with knowledge property right became very important to our country . the research demonstrated that plant could adapt water stress through signal transduction , osmotic adjustment , desiccation protection and metabolic changes 研究表明，植物能够通过信号传递、渗透调节、代谢调整、脱水保护等多种机制适应干旱胁迫，与其相关的基因相继被克隆应用于生产实践。
Ginnala is the least tolerant to drought stress . p . davidiana ' s water use efficiency has increasing trend , but the other three species have decreasing trends . ( 4 ) the a . ginnala ' s leaves are sensitive to drought , but the others are not 四树种中只有山桃水分利用效率随土壤含水量的降低呈增长趋势； ( 4 )茶条槭叶片对水分变化敏感，在干旱胁迫下，叶片发生明显增厚现象，单株叶面积显著减少，其它三个树种的叶片不易被水分因子所影响。
