井冈山大学学报（自然科学版）Issue(1)：39-42,4.DOI:10.3969/j.issn.1674-8085.2014.01.008
NaCl胁迫对黄瓜幼苗生长及光合作用特征的影响
EFFECTS OF NACL STRESS ON PLANT GROWTH AND PHOTOSYNTHETIC CHARACTERISTICS IN THE CUCUMBER SEEDLING
摘要
Abstract
Cucumber (Cucumis sativus L. Bichun) cultivars were grown in nutrient solutions with five NaCl levels (0,10,25,50,100 mmol·L-1)for the investigation of plant growth, photosynthetic and chlorophyll fluorescence parameters, and proline and MDA contents in seedling leaves. The results showed that 10 mmol/L NaCl treatment increased plant growth, high-level NaCl (≥25 mmol/L) treatment decreased the plant biomass, net photosynthetic rate (Pn), stomatal conductance (Gs), intracellular CO2 (Ci), quantum yield of PSII (ΦPSII) and chlorophyll content. Stomatal limitation(Ls), proline and MDA contents increased with NaCl treated concentration. However, photochemical efficiency of PSII (Fv/Fm) was not affected by NaCl treatment. It is concluded that low-level NaCl treatment increased plant growth. However, the decrease of chlorophyll content and stomatal closure lead to the decrease of plant photosynthesis, but photosynthetic structure was not damaged by NaCl stress≤( 100 mmol/L). Seedling of cucumber could improve the ability of salt tolerance by increasing proline content.关键词
NaCl胁迫/黄瓜/光合作用/叶绿素荧光/脯氨酸Key words
NaCl stress/cucumber/photosynthesis/chlorophyll fluorescence/proline分类
农业科技引用本文复制引用
曾志锋,闫小红,胡文海..NaCl胁迫对黄瓜幼苗生长及光合作用特征的影响[J].井冈山大学学报（自然科学版）,2014,(1):39-42,4.基金项目
江西省教育厅科技计划项目(GJJ13545) （GJJ13545）
