| 陈淑燕，毛培春,田小霞,孟 林，张德罡.4种薰衣草属植物抗旱性综合评价[J].干旱地区农业研究,2013,31(6):152~158 |
| 4种薰衣草属植物抗旱性综合评价 |
| Comprehensive evaluation of drought resistance of four lavender species |
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| DOI：10.7606/j.issn.1000-7601.2013.06.027 |
| 中文关键词: 薰衣草；抗旱性；叶片相对含水量；丙二醛 可溶性糖 超氧化物歧化酶 过氧化氢酶 |
| 英文关键词:lavender drought resistance leaf relative water content (RWC) malondialdehyde (MDA) soluble sugar content (SSC) superoxide dismutase (SOD) catalase (CAT) |
| 基金项目:北京市农林科学院科技创新能力建设专项（KJCX201101003；KJCX201201001）；北京市农林科学院草业中心人才培养基金项目 |
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| 中文摘要: |
| 采用负水头供水控水装置控制盆土体积含水量，对轻度、中度和重度干旱胁迫0、10、20、30 d和40 d后4种薰衣草属植物叶片相对含水量(RWC)、丙二醛(MDA)、可溶性糖(SSC)、超氧化物歧化酶(SOD)和过氧化氢酶(CAT) 5个抗旱生理指标的变化规律开展研究，旨在对其抗旱性进行综合评价。结果表明：随干旱胁迫强度和时间的增加，4种薰衣草的RWC均呈下降趋势，且轻度干旱胁迫的RWC显著高于中度和重度干旱胁迫（P＜0.05），其中，干旱发生至重度胁迫时，普罗旺斯薰衣草的RWC最高，为56.56%，孟士德薰衣草仅为39.02%；而MDA和SSC则呈上升趋势，且随胁迫程度的增强而增加，其中，胁迫至40 d时，普罗旺斯薰衣草的MDA较0 d（CK）各处理水平增加幅度达118.67%，
而其SSC含量显著高于其它3种薰衣草。4种薰衣草的SOD和CAT活性呈先升后降的变化趋势，均于胁迫至20 d时达到最高值，且轻度干旱胁迫下的SOD和CAT活性高于中度和重度胁迫，其中，孟士德薰衣草的SOD和CAT活性最低。根据模糊数学隶属函数法综合评价分析得出，4种薰衣草抗旱性强弱依次为：狭叶薰衣草＞普罗旺斯薰衣草＞蝴蝶薰衣草＞孟士德薰衣草。 |
| 英文摘要: |
| By investigating the change of five drought resistant indexes, including leaf relative water content (RWC), malondialdehyde (MDA), soluble sugar content (SSC), and activity of superoxide dismutase (SOD) and catalase (CAT) under light, moderate and severe drought stress for 0, 10, 20, 30 d and 40 d using the negative pressure water supplying and controlling device to control soil volumetric moisture content, the drought resistance of four lavender species was evaluated comprehensively. The results showed that, with the increase of drought stress intensity, the RWC of the four lavender species tended to decline, and the RWC under light drought stress was significantly higher than that under moderate and severe drought stress after 40 days (P<0.05). The RWC of Lavandula angustifolia cv. Munstead was only 39.02%, but that of L. angustifolia cv. Provence Blue was up to 56.56%, which was the highest among the four species. The contents of MDA and SSC in the four species were significantly increased with the intensification of drought stress. The MDA in
L. angustifolia cv. Provence Blue was increased by 118.67%, but the SSC in it was significantly higher than that in the other three species under drought stress for 40d, compared with 0 d (CK). The activities of SOD and CAT in the four species showed an increasing-summit-decreasing trend under drought stress from 0 to 40 d, and the peak values appeared at 20 d. The activities of SOD and CAT in the four species under light drought stress were higher than the ones under moderate and severe drought stress, and those in L. angustifolia cv. Munstead were the lowest at 20 d. The values of the above five indexes (RWC, MDA, SSC, SOD and CAT) were analyzed comprehensively using the subordinate function method, and it was indicated that the drought resistance of the four lavender
species was sequenced as: L. vera＞L. angustifolia cv. Provence Blue＞L. stoechas cv. Pedunculata＞L. angustifolia cv. Munstead. |
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