中国蔬菜Issue(7)：49-52,53,5.
不同耐性大白菜苗期根系形态对低钾胁迫的响应
Response of Chinese Cabbage Seedling’s Root Morphology with Different Tolerance to Potassium Deficiency
摘要
Abstract
Taking Chinese cabbage 〔Brassica campestris L. ssp.pekinensis(Lour)Olsson〕cultivars‘Defeng No.1’(tolerance to low potassium)and‘Fengkang 70’(sensitive to low potassium)as experimental material,studies the response made by dry matter accumulation during seedling stage and root system parameter of Chinese cabbage with different tolerance to potassium deficiency through hydroponics experiment.The results showed that under potassium deficiency(0.3 mmol·L-1),the root dry weight,plant dry weight,and root to shoot ratio in‘Fengkang 70’declined significantly,while there were no marked changes in‘Defeng No.1’. On the other hand,the length and surface area of thin roots(Φ≤0.2 mm)and the proportion between thin root surface area and total root system surface area were significantly increased in‘Defeng No.1’,while there were no changes detected in‘Fengkang 70’.All these results indicated that under low potassium stress,the increase of thin root length and surface area of Chinese cabbage cultivar with low potassium tolerance might increase the propotion of thin root length and its surface area,thus strengthen its tolerance to potassium deficiency.关键词
大白菜/低钾胁迫/根系形态Key words
Chinese cabbage/Potassium deficiency stress/Root system morphology引用本文复制引用
李海云,司东霞,吕福堂,张复君..不同耐性大白菜苗期根系形态对低钾胁迫的响应[J].中国蔬菜,2015,(7):49-52,53,5.基金项目
公益性行业（农业）科研专项（201203013），山东省高等学校科技计划项目 （）
