摘要
为研究不同浓度的混合盐胁迫对铁线莲叶片渗透调节和叶绿素荧光特性的影响,采用盆栽试验,设置4种浓度的NaCl+NaHCO_(3)混合胁迫试验,探索短尾铁线莲(Clematis brevicaudata)和棉团铁线莲(Clematis hexapetala)的耐盐能力。结果表明:随着混合盐胁迫浓度的提高,铁线莲的根部生物量和地上部分生物量逐渐降低,根冠比上升,膜透性加大,丙二醛的质量摩尔浓度逐渐累积;混合盐胁迫促进了铁线莲渗透调节物质的合成,可溶性糖和脯氨酸的质量分数随胁迫浓度增大持续显著提高;混合盐胁迫导致铁线莲的叶绿素的质量分数随着胁迫浓度的提高不断下降,光反应中心(PSII)最大光化学量子产量(F_(v)/F_(m))、光反应中心(PSII)潜在活性(F_(v)/F_(0))不断下降,短尾铁线莲和棉团铁线莲均受到光抑制;棉团铁线莲的耐盐碱能力高于短尾铁线莲,棉团铁线莲更适合在中等盐碱环境栽植。
In order to study the effects of saline-alkali stress on the osmotic regulation and chlorophyll fluorescence characteristics of Clematis,a pot experiment was conducted to explorethe salt tolerance of C.brevicaudata and C.hexapetala.The root biomass and above-ground biomass decreased,root-shoot ratio increased,membrane permeability increased,and MDA mass fraction accumulated gradually with the increase of saline-alkali stress concentration.Saline-alkali stress promoted the synthesis of osmotic adjustment substances,and the mass fraction of soluble sugar and proline increased significantly with the increase of stress concentration.The chlorophyll mass fraction,F_(v)/F_(m) and F_(v)/F_(0) decreased with the increase of stress concentration,indicating that C.brevicaudata and C.hexapetala were photo inhibited under saline-alkali stress.The results of subordinate function values show that the salt tolerance of C.hexapetala is higher than that of C.brevicaudata,and it is more suitable for medium saline-alkali environment.
作者
张凤娥
张丽娟
高东菊
Zhang Feng’e;Zhang Lijuan;Gao Dongju(Shanghai Vocational College of Agriculture and Forestry,Shanghai 201699,P.R.China;Hebei Tourism College)
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2022年第5期52-56,62,共6页
Journal of Northeast Forestry University
基金
上海农林职业技术学院中青年领军人才培养计划项目(A2-0273-20-01)。
关键词
混合盐胁迫
铁线莲
渗透调节
叶绿素荧光
Saline-alkali stress
Clematis
Osmotic regulation
Chlorophyll fluorescence
