摘要
[目的]研究盐碱胁迫对蚕豆幼苗生长及光合参数等指标的影响及作用机理。[方法]分别以0、5、10、15、25 mmol/L的Na2CO3处理蚕豆幼苗,达到终浓度6 d后测定各生理指标。[结果]5 mmol/LNa2CO3处理下,净光合速率达到最大值,为对照的176.83%,差异显著;15 mmol/LNa2CO3处理时净光合速率受到抑制,此时Gs、Ci下降,Ls升高,25 mmol/LNa2CO3处理时,净光合速率受到明显抑制,为对照的26.68%,差异显著。[结论]蚕豆的净光合速率与其生长状况相一致。盐碱等胁迫对植物光合作用的影响因素主要归结为气孔因素和非气孔因素。
[Objective] The effect of the salt stress on the seedling growth and the photosynthetic parameters of broad bean and other indicators and its mechanism was studied.[Method] The photosynthetic index the broad bean seedling was measured under the treatment of 0,5,10,15 and 25 mmol/L of Na2CO3,respectively,after 6 days when it was in the final concentration.[Results] Under the treatment of 5 mmol/L Na2CO3,the net photosynthetic rate reached the maximum,which was 176.83% of the control,with significant difference;however in 15 mmol/L Na2CO3 the net photosynthetic rate was inhibited,at this time,the content of Gs and Ci was decreased and Ls,increased;in 25 mmol/L Na2CO3,the net photosynthetic rate was inhibited,which was 26.68% of the control,with the significant difference.[Conclusion] The net photosynthetic rate of broad bean was consistent with its growth status.The plant photosynthesis and others of broad bean affected the salinity stresses were mainly attributed to stomatal and non-stomatal factors.
出处
《安徽农业科学》
CAS
北大核心
2010年第6期2861-2862,2913,共3页
Journal of Anhui Agricultural Sciences
关键词
盐碱胁迫
光合特性
气孔限制
非气孔限制
蚕豆
Alkaline salt stress
Photosynthetic performance
Stomatal limit
Non-stomatal limitat
Vicia faba L.