广西林业科学2023，Vol.52Issue(6)：707-712,6.DOI:10.19692/j.issn.1006-1126.20230605
干旱胁迫对翅茎白粉藤光合作用及叶绿体超微结构的影响
Effects of Drought Stress on Photosynthesis and Chloroplast Ultrastructures of Cissus hexangularis
摘要
Abstract
In order to explore drought tolerance of Cissus hexangularis and provide scientific basis for selecting plants in harsh environments such as mine restoration,stone slope greening and roof greening,taking C.hexan-gularis as experimental materials,setting normal watering,moderate drought stress and severe drought stress,effects of drought stress on growth traits,photosynthetic parameters and chloroplast ultrastructures of C.hexan-gularis were analyzed.Results showed that plant height,fresh weight of aboveground part,fresh weight of under-ground part and number of leaves increased,and ground diameter,leaf length,leaf width and root-shoot ratio decreased after stress under moderate and severe stress.With increase of drought stress degree,increment of plant height increased,increment of fresh weight of aboveground part and fresh weight of underground part showed trends of increase firstly and then decrease,increment of ground diameter,leaf length,leaf width and number of leaves showed trends of decrease,and increment of root-shoot ratio showed trend of increase.Under moderate and severe drought stress,diurnal variation curves of net photosynthetic rates,stomatal conductances and inter-cellular CO2 concentrations of C.hexangularis leaves had double peaks,showing obvious lunch break in photosynthesis.Daily mean values of stomatal conductance,inter-cellular CO2 concentration and transpira-tion rate were all decreased.Daily mean values of net photosynthetic rate and water use efficiency showed trends of increase firstly and then decrease,which were higher in moderate drought stress.Structure of chloro-plasts was damaged to a certain extent,and degree of damage increased with increase of drought stress degree,but there was no death of plants,which indicated that C.hexangularis had drought resistance to a certein extern.关键词
光合作用/叶绿体超微结构/翅茎白粉藤Key words
photosynthesis/chloroplast ultrastructure/Cissus hexangularis分类
农业科学引用本文复制引用
李进华,麦生威,李冰,赵伟,吴国文,张广照,唐庆..干旱胁迫对翅茎白粉藤光合作用及叶绿体超微结构的影响[J].广西林业科学,2023,52(6):707-712,6.基金项目
广西乡土藤本在石质边坡快速生态恢复应用研究与示范(新祥合工2022-0003号) （新祥合工2022-0003号）
广西科技基地和人才专项(桂科AD17129021) （桂科AD17129021）
