海刀豆的抗逆生理生化特征分析
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摘要
为了解西沙群岛上海刀豆(Canavalia maritima)的抗逆特性,对其叶片解剖结构、生理学特征和养分状况进行了分析。结果表明,海刀豆叶片的栅栏组织发达,气孔密度大;叶绿素a/b低于3∶1;抗氧化酶活性普遍较高,以SOD活性最大;脯氨酸含量高;在土壤养分含量较低的情况下,叶片中的营养元素含量仍然较高。因此,海刀豆具有耐干旱、强光、高温和贫瘠等抗逆生物学特性,可以作为热带珊瑚岛(礁)防风固沙和植被恢复物种。
In order to understand the stress resistance characters of Canavalia maritima in Paracel Islands, the anatomical structure, physiological characteristics and nutrient status of leaves were studied. The results showed that palisade tissue of C. maritima leaves developed well with high density of stomata. The chlorophyll a/b was lower than 3∶1. The antioxidants enzyme activities were high, especially the activity of SOD was the highest,and content of proline was high. In addition, under low soil nutrient content, the nutrient content in leaves was high. Therefore, Canavalia maritima could be used for vegetation restoration and reversing desertification,because it had characters in resistance to drought, strong light, high temperature and infertile.
In order to understand the stress resistance characters of Canavalia maritima in Paracel Islands, the anatomical structure, physiological characteristics and nutrient status of leaves were studied. The results showed that palisade tissue of C. maritima leaves developed well with high density of stomata. The chlorophyll a/b was lower than 3∶1. The antioxidants enzyme activities were high, especially the activity of SOD was the highest,and content of proline was high. In addition, under low soil nutrient content, the nutrient content in leaves was high. Therefore, Canavalia maritima could be used for vegetation restoration and reversing desertification,because it had characters in resistance to drought, strong light, high temperature and infertile.
引文
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