植物营养与肥料学报2011，Vol.17Issue(3)：532-538,7.
镉胁迫对不同基因型小麦产量及构成因子的影响
Effect of cadmium stress on yield and yield components of different wheat genotypes
摘要
Abstract
To investigate the effect of the soil Cd concentration on yield and yield components of different wheat genotypes, a pot culture experiment was performed. Six high-Cd accumulating wheat (HCA) and five low-Cd accumulating wheat (LCA) were used under 0. 28 ( CK), 5, 10 and 20 mg/kg soil Cd concentrations. The wheat yield decreased gradually and significantly with increasing Cd concentration in the soil, and the l000-grain weight ( TGW), tiller number, spikelet number and kernel number per spike decreased gradually, while the effective tiller number increased significantly in the 5 mg/kg treatment, but was reduced significantly at higher soil Cd concentrations. The correlation and path analysis procedures were utilized to investigate the effect of Cd stress on yield and yield components of the different wheat genotypes. The results showed that Cd in the soil can easily lead to significantly reduced wheat yield, mainly because of shriveled grains and empty seeds, which suggested that Cd may affect fertilization or pollination, and growth of the embryo or endosperm. In addition, the yield, spikelet number per spike and kernel number per plant of HCA genotypes were significantly lower than those of LCA genotypes under the four different soil Cd concentrations, TGW was unchanged between HCA and LCA, while the effective tiller number of the former was higher than that of the latter.关键词
小麦/镉胁迫/产量/基因型差异分类
农业科技引用本文复制引用
杨玉敏,张庆玉,杨武云,田丽,雷建容,张冀,李俊..镉胁迫对不同基因型小麦产量及构成因子的影响[J].植物营养与肥料学报,2011,17(3):532-538,7.基金项目
国家自然科学基金(3047106,30771338) （3047106,30771338）
国家"973"项目(2006CB101700) （2006CB101700）
国家"863"计划(2006AA10ZIC6) （2006AA10ZIC6）
国家支撑计划项目(2006BAD13B02-03,2006BAD01A02) （2006BAD13B02-03,2006BAD01A02）
四川省育种攻关项目(2006YZGG-28) （2006YZGG-28）
四川省财政育种青年基金项目(2010QNJJ-020) （2010QNJJ-020）
国家小麦产业技术体系项目(nycytx-03)资助. （nycytx-03）
