摘要
利用NaCl、PEG6000、甘露醇模拟高渗胁迫条件,对RRIM600巴西橡胶树种子进行浸种处理7天,测定了不同浸种处理橡胶树萌发籽苗的多项生理指标,并应用主成分及隶属函数分析法对影响橡胶树苗期抗旱性的主要生理指标和不同浸种处理橡胶树萌发籽苗的抗旱性进行了分析评价。结果表明:与橡胶树苗期抗旱性关系最密切的生理指标有超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、可溶性糖(SS)、脯氨酸(PRO)、过氧化氢(H2O2)、超氧阴离子(O2-);不同浸种处理橡胶树萌发籽苗抗旱性强弱依次为:甘露醇(10%)>PEG6000(15%)>NaCl(3%)>甘露醇(15%)>PEG6000(25%)>甘露醇(20%)>NaCl(2%)>NaCl(4%)>PEG6000(35%)>甘露醇(20%)。
Hevea brasiliensis seeds of RRIM600 were soaked for 7days under hypertonic solution stresses of NaCl, Mannitol, PEG6000 and the seedlings which could stand the high-osmosis stress were observed to estimate the physiological indexes related to the drought resistance. The analysis of principal components and subordinate function showed that superoxide dismutase (SOD),catalase (CAT), soluble sugar (SS), praline (PRO), hydrogen peroxide (H2O2), Superoxide Free Radical (O2-) were the most important physiological indexes for drought resistance in rubber seedling, and that all the treatments under trial gave a drought resistance in the order of Mannitol (10%)〉PEG6000(15%)〉NaCl(3%)〉Mannitol (15%)〉PEG6000 (25%)〉Mannitol (20%)〉NaCl(2%)〉NaCl(4%)〉PEG6000 (35%)〉Mannitol (20%).
出处
《中国农学通报》
CSCD
北大核心
2010年第1期260-264,共5页
Chinese Agricultural Science Bulletin
基金
国家自然科学基金项目"橡胶树整体水分传输及其与抗旱关系研究"(30660029)
关键词
高渗胁迫
巴西橡胶树
抗旱性
Hypertonic solution stress, Hevea brasiliensis, drought resistance