【摘要】 [目的]研究对黑老虎幼苗在不同干旱胁迫条件下的抗旱生理机理与适应机制,为黑老虎引种栽培、良种选育提供科学的理论依据。[方法]以1年生黑老虎幼苗为试验材料,采用PEG-6000人工模拟干旱的方法,对干旱胁迫下黑老虎叶片的SPAD值、相对含水量(RWC)、丙二醛(MAD)、细胞膜透性(RP)、脯氨酸(Pro)和超氧化物岐化酶(SOD)酶活性等生理生化指标的变化进行分析研究。[结果]随着干旱胁迫的增加,黑老虎的叶片SPAD值和RWC均呈现下降的趋势,其中RWC下降显著;MAD、Pro、RP及SOD活性则呈现不断增加的趋势,MAD的含量和RP的值都显著性的增加。[结论]黑老虎对于干旱胁迫较为敏感,具有抵御轻微干旱的一定能力;若水分缺失过多,会影响黑老虎的生长状态。更多还原

【Abstract】 [Objective] The aim was to research drought resistance and adaptation mechanisms of Kadsura coccinea under different drought stresses. [Method] The seedlings of Kadsura coccinea growing one year were taken as materials in order to investigate and analyze leaf SPAD value, relative water content(RWC), malonaldehyde(MAD), cell membrane permeability(RP), proline(PRO) and superoxide dismutase activity(SOD). [Result] As drought stress improved, leaf SPAD value and RWC were both diminishing and RWC fell remarkably; MAD, Pro, RP and SOD activity were increasing; MAD and RP grew significantly. [Conclusion] Kadsura coccinea is much sensitive to drought stress and will be affected if water loss is too much high.更多还原