4种地被观赏竹的抗旱性研究

Study on the Drought Resistance of Four Dwarf Ornamental Bamboos

以黄条金刚竹、菲白竹、铺地竹、菲黄竹4种地被观赏竹为试验材料,通过人为控水干旱胁迫,以正常浇水组为对照,测定了干旱胁迫下4种地被观赏竹的质膜透性、丙二醛含量、游离脯氨酸含量等生理生化指标,分析了4竹种对干旱胁迫的响应情况。结果表明:随着干旱胁迫时间的延长,叶片的细胞质膜透性、丙二醛含量、游离脯氨酸含量均呈上升趋势,可溶性糖含量和过氧化氢酶(CAT)、过氧化物酶(POD)、超氧化物歧化酶(SOD)等保护酶则表现为先升后降的趋势。采用隶属函数方法综合分析生理生化指标,评价各竹种的抗旱性依次为黄条金刚竹>菲白竹>菲黄竹>铺地竹,与4种地被观赏竹干旱胁迫下的形态表现一致。

The physiological and biochemical responding of four dwarf bamboos （Pleioblastus kongosanensis f. aureostriatus, Sasa fortunei, Sasa argenteostriatus and Sasa auricoma） to drought stress by withholding water were studied. The results indicated that the free proline contents, cell membrane permeability and the MDA contents of bamboo leaves increased with the prolongation of the stress time, the soluble sugar contents and the activity of SOD, POD and CAT showed increasing at the beginning and decreasing at the end. The physiological and biochemical indexes were measured to assess the drought-resistant ability of dwarf bamboos by Membership Function. The results showed that the four dwarf bamboos were ordered in sequence from strong to weak as： P. kongosanensis f. aureostratus Muroi et Y. Tanaka （e） 〉 S. fortunei 〉 S. auricoma 〉 S. argenteostriatus , and the result was consistent with the morphological character.