Influence of water deficit and genotype on photosynthetic activity, dry mass partitioning and grain yield changes of winter wheat

	Influence of water deficit and genotype on photosynthetic activity, dry mass partitioning and grain yield changes of winter wheat
	Wu, Xiaoli ; Bao, Weikai
刊名	AFRICAN JOURNAL OF AGRICULTURAL RESEARCH
	2011
卷号	6 期号:25 页码:5567-5574
关键词	Dry mass partitioning maximum net photosynthetic rate Pn-PAR response curves photosynthetic pigment genotypes
ISSN号	1991-637X
通讯作者	Bao, WK (reprint author), Chinese Acad Sci, Chengdu Inst Biol, Beijing 100864, Peoples R China.
产权排序	2
英文摘要	Pn-PAR response curves, gas exchange, dry mass partitioning and grain yield of four different genotypes of wheat were investigated in a randomized complete block design under different watering regimes (85, 55 and 25% FC). The results indicated that genotype differences existed in the adaptation response to water deficit which included change to growth strategies coupled with photo-physiological strategies. Water treatment was the dominating factor which limited plant growth, productivity and yield. As water deficit increased, stomatal conductance (gs), saturation irradiance (SI) and maximum net photosynthetic rate (Pmax) decreased, while irrigation water use efficiency (IWUE), compensation irradiance (CI) and dark respiration (R(D)) increased in all genotypes, with a more rapid decline in wet climate cultivars. Differences in photosynthetic responses existed in different climate genotypes at 55% FC. Reduction of Pn for the wet climate cultivar was mainly due to gs, while for the dry climate cultivar, Pn coupled with photosynthetic pigment increased. At 25% FC, water deficit decreased Pn attributed to non-stomatal limitations in four genotypes. Dry mass was reduced in droughted plants and the percentage increased in dry mass allocated to roots. Furthermore, the wet climate genotypes had the greatest decrease in Chla/b ratio. These findings demonstrated that the superior drought resistance in dry climate cultivars could be attributed to higher photosynthetic capacity, dry matter allocation and then grain yield.
学科主题	Agriculture
收录类别	SCI
资助信息	National science and technology programs of China[2008BAD98B03]
语种	英语
WOS记录号	WOS:000298785400001
公开日期	2012-11-09
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/23426]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Wu, Xiaoli,Bao, Weikai. Influence of water deficit and genotype on photosynthetic activity, dry mass partitioning and grain yield changes of winter wheat[J]. AFRICAN JOURNAL OF AGRICULTURAL RESEARCH,2011,6(25):5567-5574.
APA	Wu, Xiaoli,&Bao, Weikai.(2011).Influence of water deficit and genotype on photosynthetic activity, dry mass partitioning and grain yield changes of winter wheat.AFRICAN JOURNAL OF AGRICULTURAL RESEARCH,6(25),5567-5574.
MLA	Wu, Xiaoli,et al."Influence of water deficit and genotype on photosynthetic activity, dry mass partitioning and grain yield changes of winter wheat".AFRICAN JOURNAL OF AGRICULTURAL RESEARCH 6.25(2011):5567-5574.