低温弱光对工艺葫芦幼苗叶绿素荧光特性及光合特性的影响

Effects of Low Temperature and Low Light on Chlorophyll Fluorescence and Photosynthetic Characteristics of Calabash Seedlings

为了研究低温弱光对工艺葫芦幼苗叶绿素荧光特性及光合特性的影响,选用大八宝葫芦种子为试验材料,研究不同程度低温弱光胁迫对葫芦幼苗光合作用和叶绿素荧光特性的影响。结果表明,低温弱光下,叶绿素a+b含量、Pn、Gs、Tr、Fv/Fm、qP均下降;叶绿素a/b、细胞间CO 2浓度随着低温弱光胁迫的加剧呈上升趋势;qN在中度低温弱光胁迫下,处理10 d后相比处理前增加了10.3%。

In order to study the effect of low temperature and low light on chlorophyll fluorescence and photosynthetic characteristics of calabash seedlings,seeds of big babao calabash were selected as experimental materials to study the effects of different degrees of low temperature and low light stress on photosynthesis and chlorophyll fluorescence characteristics of calabash seedlings.The results showed that the content of chlorophyll a+b,Pn,Gs,Tr,Fv/Fm and qP decreased under low temperature and weak light.Chlorophyll a/b and intercellular CO 2 concentration increased with low temperature and low light stress.Under moderate low temperature and low light stress,qN increased by 10.3%10 days after treatment compared with before treatment.