摘要
为明确寒地冬小麦返青后各生育阶段光合生理特性对小麦植株生长发育及籽粒形成的影响,以东农冬麦1号为试验材料,对大田种植返青后不同生育阶段小麦叶片光合参数、叶绿素、总可溶性糖和蔗糖含量及籽粒总可溶性糖、蔗糖和淀粉含量等生理指标进行测定分析。结果表明,返青后,随着生育期延长,小麦叶片光合速率、蒸腾速率呈先上升后下降趋势,开花期达到最大值。在开花期之前,气孔导度与胞间CO2浓度均呈上升趋势,光合速率主要受气孔因素影响;开花期后气孔导度与胞间CO2浓度呈相反变化趋势,此时期影响光合速率降低的主要是非气孔因素。叶绿素含量先上升后下降,灌浆期达到最大值;总可溶性糖及蔗糖含量呈下降-上升-下降趋势;籽粒中淀粉含量随总可溶性糖和蔗糖含量的下降而上升。
Photosynthetic parameters, chlorophyll content, soluble sugar content, sucrose content and starch content of tillering nodes and leaves of Dongnongdongmail were determined under different growing periods after returning green stages in order to study the effects of photosynthetic and physiological characteristics on kernel formation and growth of Dongnongdongmail. The results showed that with the process of growth net potosynthetierate （Pn） and transpiration rate （Tr） had a trend of inereasing at first, then decreasing and reached the maximum during the anthesis. Before anthesis, there was a similar trend in the variation of stomatal conductance （Gs） and intercellular CO2 concentration （Ci）, and this indicated that stomatal factor was the main reason inducing the changes of Pn. After anthesis, an opposite trend was found in the variation of Gs and Ci, indicating that inhibition of Pn wasmainly caused by the non-stomatal factor, chlorophyll content had a trend of increasing at frst, men decreasing and reached the maximum during the grain filling stage, while the changeing trend of soluble sugar and sucrose content was decreasing-increasing- decreasing and starch content of kernel was increased with the soluble sugar and sucrose content decreased.
出处
《东北农业大学学报》
CAS
CSCD
北大核心
2013年第7期58-63,共6页
Journal of Northeast Agricultural University
基金
高等学校博士学科点专项科研基金课题(20112325110003)
黑龙江省教育厅科学研究重点项目
黑龙江省教育厅青年基金项目(11551067)
东北农业大学创新团队项目(CXZ003)
东北农业大学博士启动基金(2010RCB51)
关键词
东农冬麦1号
返青后
光合生理特性
Dongnongdongmai1
returning green stage
photosynthetic and physiological characteristic
