模拟干旱胁迫下喀斯特地区4种幼苗的生理特征比较

为了解喀斯特适生树种的抗旱性,以喀斯特地区伞花木、圆果化香、单性木兰和油茶一年生幼苗为试验材料,采用不同浓度(0、10%、20%、30%)聚乙二醇(PEG-6000)人工模拟干旱的方法造成水分胁迫,比较4种幼苗叶片相对含水量(RWC)、质膜相对透性(RMP)、丙二醛(MDA)、超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性、游离脯氨酸(Pro)和可溶性蛋白质含量的变化。结果表明,经干旱胁迫后,各供试树种叶片RWC减少、RMP增大、Pro和MDA含量增加,可溶性蛋白变含量降低,SOD和POD活性呈先升后降的变化趋势;4个树种表现出一定抗旱耐旱潜力,但相比之下,3个喜钙树种的抗旱能力高于油...

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Bibliographic Details
Published in广东农业科学 Vol. 39; no. 15; pp. 35 - 38
Main Author 吴显芝 刘明靖
Format Journal Article
LanguageChinese
Published 凯里学院环境与生命科学学院,贵州凯里,556011 2012
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ISSN1004-874X
DOI10.3969/j.issn.1004-874X.2012.15.012

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Summary:为了解喀斯特适生树种的抗旱性,以喀斯特地区伞花木、圆果化香、单性木兰和油茶一年生幼苗为试验材料,采用不同浓度(0、10%、20%、30%)聚乙二醇(PEG-6000)人工模拟干旱的方法造成水分胁迫,比较4种幼苗叶片相对含水量(RWC)、质膜相对透性(RMP)、丙二醛(MDA)、超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性、游离脯氨酸(Pro)和可溶性蛋白质含量的变化。结果表明,经干旱胁迫后,各供试树种叶片RWC减少、RMP增大、Pro和MDA含量增加,可溶性蛋白变含量降低,SOD和POD活性呈先升后降的变化趋势;4个树种表现出一定抗旱耐旱潜力,但相比之下,3个喜钙树种的抗旱能力高于油茶。
Bibliography:WU Xian-zhi, LIU Ming-jing (College of Environment and Life Sciences, Kaili University, Kaili 556011, China)
44-1267/S
Karst; drought resistance; calcicolous, Camellia oleifera Abel
In order to understand the drought resistance of Karst plants, changes of some physiological characteristics of 4 annual seedlings (Eurycorymbus cavalerei (Levi.) Rand.et Hand-Mazz, P.longipes Wu, R.septentriona!is Dandy, Camellia oleifera Abel) under simulated drought stress were studied, using different concentration (0, 10%, 20%, 30% )of PEG-6000. The results showed that under drought stress, relative water content (RWC) and soluble protein of 4 trees decreased, the relative permeability of membrane (RMP) increased, the content of Pro and MDA increased. SOD and POD activities present first increased then decreased. The drought resistance of 3 Calcicolous were stronger than Camellia oleifera Abel .
ISSN:1004-874X
DOI:10.3969/j.issn.1004-874X.2012.15.012