大豆科学2011，Vol.30Issue(3)：419-423,5.
草甘膦对抗草甘膦大豆光合特性日变化的影响
Effect of Glyphosate on Photosynthesis Diurnal Variation of Glyphosate-resistant Soybean [ Glycine max (L.) Merr. ]
摘要
Abstract
Random complete block design was used to research the different dosages of glyphosate on diurnal variation of photo synthetic characteristics in leaves of glyphosate-resistant soybean (RRI) in the field. The results showed that: (1) The trend of diurnal variation of net photosynthetic rate (Pn), transpiration rate (Tr) and stomatal conductance (Gs) in RR1 leaves showed a single peak curve, the peak appeared at about 10:00, 12:00 and 10:00, respectively. Chlorophyll content index (CCI) declined until 14: 00, then increased. The water use efficiency (WUE) and intercellular CO2 concentration (Ci) of RR1 changed like wave as time went on, WUE appeared three peaks at 6: 00, 10: 00 and 16: 00, respectively, while the highest Ci was appeared at 6:00. (2) The trend of diurnal variation of photosynthetic characteristics in RRI leaves treated with g]yphosate was similar with the control. Pn and CCI decreased with increasing of glyphosate dosage, but only dropped significantly when glyphosate dose ＞ 4.48 L · hm-2. Glyphosate dose at 1.12 L · hm -2 promoted Gs of RR1, while the others inhibited Tr and Gs before 12:00 (including 12:00). Glyphosate increased Tr and Gs of RR1 after 12:00. Ci of RR1 increased with increasing of glyphosate dosage, and glyphosate ＞ 2. 24 L · hm-2 reduced WUE of RR1. Results suggest photosynthetic characteristics and chlorophyll content of RR1 leaves are affected by photosynthetic active radiation and glyphesate.关键词
草甘膦/抗草甘膦大豆/光合特性/日变化Key words
Glyphosate/ Glyphosate-resistant soybean/ Photosynthetic characteristics/ Diurnal variation分类
农业科技引用本文复制引用
原向阳,郭平毅,张丽光,王鑫,吕苗苗,张红刚,宋喜娥..草甘膦对抗草甘膦大豆光合特性日变化的影响[J].大豆科学,2011,30(3):419-423,5.基金项目
引进国际先进农业科学技术计划"948计划"资助项目(61002) （61002）
山西农业大学2009年引进人才科研启动项目(XB2009018) （XB2009018）
山西省研究生优秀创新资助项目(20081063). （20081063）
