[大穗型小麦产量形成过程中光合特性的动态变化]

[Dynamic changes of photosynthetic characteristics in big-spike wheat yield formation].

作者信息

Wang Li-Fang, Xu Xuan-Bin, Wang De-Xuan, Shangguan Zhou-Ping

机构信息

Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi, China.

出版信息

Ying Yong Sheng Tai Xue Bao. 2012 Jul;23(7):1846-52.

PMID:23173458

Abstract

A field experiment was conducted to investigate the yield traits, leaf photosynthetic rate, chlorophyll fluorescence parameters, chlorophyll content (Chl), and leaf area index (LAI) of eight new big-spike wheat lines, with multiple-spike cultivar Xinong 979 (Triticum aestivum cv. Xinong 979) as the control. The eight new lines had significantly higher kernel numbers per spike, kernel qualities, and 1000-grain mass but lower spike numbers per unit area, and the lines 2036, 2037, 2038, and 2040 had significantly higher yields than the control. The average net photosynthetic rate (P(n)) of the eight new lines had no significant difference with that of the control, but the PS II maximum energy conversion efficiency, PS II actual photochemical efficiency, photochemical quenching coefficient, and PS II reaction center activity of the lines were higher than those of the control. The leaf Chl of the lines 2037, 2040, 2039, 2038 and 2036 were 17.5%, 19.1%, 15.3%, 13.9%, and 7.9% higher than those of the control, and their LAI was significantly higher than that of the control and declined slowly in late growth period.

摘要

进行了一项田间试验，以研究8个大穗型小麦新品系的产量性状、叶片光合速率、叶绿素荧光参数、叶绿素含量（Chl）和叶面积指数（LAI），以多穗型品种西农979（普通小麦品种西农979）作为对照。这8个新品系的每穗粒数、籽粒品质和千粒重显著更高，但单位面积穗数较低，其中2036、2037、2038和2040品系的产量显著高于对照。这8个新品系的平均净光合速率（P(n)）与对照无显著差异，但这些品系的PS II最大能量转换效率、PS II实际光化学效率、光化学猝灭系数和PS II反应中心活性均高于对照。2037、2040、2039、2038和2036品系的叶片叶绿素含量分别比对照高17.5%、19.1%、15.3%、13.9%和7.9%，其叶面积指数显著高于对照，且在生育后期下降缓慢。