水分胁迫对不同广藿香品种生理生化的影响

Effect of Water Stress on Physiological-Biochemical Characteristics of Different Pogostemon cablin( Blanco) Benth. Cultivars

以不同产地的广藿香为研究材料,采用盆栽和称重控制浇水的方法,设置对照(CK)、轻度胁迫(T1)、中度胁迫(T2)、重度胁迫(T3)4个处理(土壤含水量分别为土壤田间持水量的80%、60%、50%和30%),研究不同水分处理后广藿香生理生化指标的变化规律。结果表明,随着土壤含水量的降低,广藿香叶片中相对含水量减少,脯氨酸、可溶性蛋白、丙二醛均呈先下降后上升趋势;超氧化物歧化酶、过氧化氢酶含量呈现上升趋势。4个不同产地的广藿香均表现出一定的抗旱耐旱能力,相比之下,海南产与湛江产广藿香抗旱能力更强。

In order to understand the physiological-biochemical characteristics of water stress on different Pogostemon cablin （Blanco） Benth. cultivars, four different levels of water stress, mild water stress（T1,60% FC）, moderate water stress （T2, 50% FC）, severe water stress（T3, 30% FC） and the contrd（CK,80% FC）, were applied to study the effects of water stress on the Pogostenron cablin （Blanco）Benth. cuhivars by pot culture and from different region. The results showed that with the increase of water stress, the relative water content of leaves decreased, proline, soluble protein, malondialdehyde decreased first and then increased; the activities of superoxide dismutase and catalase content showed a rising trend. Four different habitats Pogostemon cablin showed certain ability of drought resistance, by contrast, Pogostemon cablin from Hainan and Zhanjiang had stronger drought resistance ability.