摘要
本文通过对名山白毫茶苗进行干旱处理并分析其生理生态响应机制。结果表明:①茶苗对干旱胁迫的形态响应机制为:生长速率的调整,即株高和基径生长速率显著减小,生物量的生产降低,且胁迫程度越重以及时间越长,下降幅度越大;植株构件的生物量显著降低,生物量分配格局改变,即根冠比提高。叶片结构特征具有向着耐旱演化的趋势,即叶片、角质层、栅栏组织均增厚;初步筛选出影响茶苗抗旱性的主要形态指标有:基径绝对生长量、株高绝对生长量、生物量生产、根冠比。②茶树幼苗对干旱胁迫的生理生化响应机制为:保护性的渗透调节物质含量和保护性酶活性的增加。初步筛选出茶苗的生理生化指标有:叶片含水量、脯氨酸、丙二醛、可溶性糖。
The drought treatment trial of Mingshan Baihaochamiao tea seedles were conducted to analyze their physiological and ecological response mechanism. The results showed that ： （i） The growth rate of height and diameter significantly decreased and the production of biomass reduced, and the decline was sharper with more serious stress and longer stress time. Components of the plant biomass decreased significantly, biomass distribution pattern changed, namely,the root/shoot ratio increased, leaf structural characteristics had the trend toward dreughtresistant, that was, leaves and cuticle, fences organizations thickened. The main form indicators of tea seedle that affected anti-drought were the absolute growth of base, the absolute growth of plant height, biomass production, the reot/shoot ratio. （ii） The infiltration regulation matters and the activity of protection enzyme increased and the main physiological and biochemical indicators of tea seedle that affected antidrought were the water content of leaves, proline, MDA, soluble sugar.
出处
《西南农业学报》
CSCD
北大核心
2010年第5期1497-1503,共7页
Southwest China Journal of Agricultural Sciences
基金
四川省科技攻关项目(2006G11-003)
关键词
茶苗
干旱胁迫
生理生态
响应
Tea seedle
Drought stress
Physiological and biochemical
Response
