Relationship between yield, carbon isotope discrimination and stem carbohydrate concentration in spring wheat grown in Ningxia Irrigation Region (North-west China)
文献类型： 外文期刊
作者： Zhu, Lin 1 ; Li, Shu Hua 3 ; Liang, Zong Suo 2 ; Zhang, Zhan Feng 4 ; Xu, Xing 1 ;
作者机构： 1.Ningxia Univ, Minist Educ, Key Lab Restorat & Reconstruct Degraded Ecosyst N, Yinchuan 750021, Peoples R China
2.NW A&F Univ, Coll Life Sci, Yangling 712100, Peoples R China
3.Ningxia Acad Agr & Forestry Sci, Ningxia Key Lab Agr Biotechnol, Yinchuan 75002, Peoples R China
4.Huxian Cent Tree Nursery, Xian 710307, Peoples R China
关键词： carbon isotope discrimination;grain yield;harvest index;specific stem DW;water-soluble carbohydrate;wheat (Triticum aestivum L.)
期刊名称：CROP & PASTURE SCIENCE （ 影响因子：2.286； 五年影响因子：2.507 ）
ISSN： 1836-5795
年卷期： 2010 年 61 卷 9 期
页码：
收录情况： SCI
摘要： Carbon isotope discrimination (Delta) in flag leaf, grain and basal stem, grain yield (GY), and harvest index (HI), were determined in a collection of 20 bread wheat cultivars (landraces, released cultivars and advanced lines) in Yinchuan, located in the central region of the Ningxia region (North-west of China), in 2007 and 2008. In 2008, specific stem DW (SSDW) and carbohydrates, including water-soluble carbohydrate (WSC), non-water-soluble carbohydrates (NWSC) and total non-structural carbohydrate (TNSC) in stem were also measured. Relationships between GY, HI, SSDW, accumulation and mobilisation of stem carbohydrates and Delta were analysed. There were positive and significant correlations between grain Delta, basal stem Delta and GY in 2007 and 2008. A significant and positive correlation between Delta and HI was found. In 2008, positive correlations were recorded between stem WSC concentration, SSDW sampled 7 days after anthesis and Delta. Carbon isotope discrimination was associated positively with remobilisation efficiency of stem WSC and TNSC. While negative relationships were noted between Delta and SSDW at maturity, stronger association was noted between Delta, carbohydrate concentration, accumulation and mobilisation efficiencies on stem length basis than on stem DW basis. In conclusion, there is a good relationship between Delta and carbohydrate in stem of wheat when irrigation does not meet the crop's water requirement and wheat experiences a slight water stress after anthesis.
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