干旱区生态环境知识资源中心(Arid): 开花后水分亏缺对小麦生理影响与化学调控的补偿效应

Arid

	开花后水分亏缺对小麦生理影响与化学调控的补偿效应
其他题名	Compensative effects of plant chemical regulation on physiological harm caused by water stress after flowering of winter wheat
	段留生; 关彩虹; 何钟佩; 翟志席
来源期刊	中国生态农业学报
ISSN	1671-3990
出版年	2003
卷号	11 期号:4 页码:114-117
中文摘要	旱棚PVC管栽培冬小麦"京冬8号"试验研究结果表明，小麦开花后水分亏缺影响氘水（~3H_2O）在和旗叶中动态、初生根和穗下节维管束特征、根系活力、叶片蒸腾速率、气孔阻力和~(14)C同化物输出速率及比例植物生长延缓剂HK6拌种和起身期叶面喷施处理，可增加初生根大导管和维管束鞘横截面积，提高根系活力，促进根系~3H_2O 的吸收和向地上部器官运输；增加穗下节大维管束横截面积，并可能促进水分向穗部运输；增加中气孔阻抗，维持适当水分蒸腾速率，缓解水分胁迫下叶片3~H_2o的减少；提高单株水分利用效率，化学控制处理缓解和补偿水分胁迫对小麦生理造成的不良影响，对小麦节水栽培和抗旱增产具有应用潜力。
英文摘要	The experiment was conducted with winter wheat cv. jingdong 6 in PVC pipe and under rain free condition. It is indicated that all the distribution of ~3H_2O in roots and flag leaf, characteristics of vascular bundle in primary roots and internode below ear, roots validity, transpiration rate and stomatal impedance of flag leaf are changed by water stress after flowering. The treatments of seed coating and foliage spraying at early jointing stage using Beinong 6(HK6),a plant growth regulator, are proved to release arid compensate the harmful effects of water stress. Both the area of vascular bundle in primary roots and internode below ear are increased by HK6, while the roots validity and the ability of water absorption and transportation are promoted. In flag leaf, stomatal impedance is changed to maintain the transpiration rate and the water use efficiency of single wheat plant is higher. The rate and ratio of ~l4C-assimilates exported from flag leaf are increased by the chemical regulation.
中文关键词	小麦 ; 水分亏缺 ; 植物生长调节剂 ; 补偿效应
英文关键词	Winter wheat Water stress Plant growth regulator Compensative effects
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:1327756
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/204699
作者单位	中国农业大学作物化学控制研究中心, 国家植物生理生化重点实验室, 北京 100094, 中国
推荐引用方式 GB/T 7714	段留生,关彩虹,何钟佩,等. 开花后水分亏缺对小麦生理影响与化学调控的补偿效应[J]. 中国农业大学,2003,11(4):114-117.
APA	段留生,关彩虹,何钟佩,&翟志席.(2003).开花后水分亏缺对小麦生理影响与化学调控的补偿效应.中国生态农业学报,11(4),114-117.
MLA	段留生,et al."开花后水分亏缺对小麦生理影响与化学调控的补偿效应".中国生态农业学报 11.4(2003):114-117.