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硅对雷竹抗旱性的影响
引用本文:潘月,戎洁庆,盛卫星,桂仁意.硅对雷竹抗旱性的影响[J].浙江农林大学学报,2013,30(6):852-857.
作者姓名:潘月  戎洁庆  盛卫星  桂仁意
作者单位:1.浙江农林大学 亚热带森林培育国家重点实验室培育基地,浙江 临安 311300;2.浙江省建德市林业局,浙江 建德 311600
基金项目:中国科学院战略性先导科技专项(XDA05070303);浙江省重点科技创新团队资助项目(2009R50030)
摘    要:分析施硅对干旱胁迫下雷竹Phyllostachys violascens生理生化性状的影响,探讨施硅对雷竹抗旱性的影响机制。采用水培实验的方法,以聚乙二醇(PEG 6000)模拟干旱胁迫,外加不同浓度的硅,测定它们对雷竹叶片可溶性糖质量分数、脯氨酸质量分数、过氧化物酶活性、过氧化氢酶活性及光合参数等指标的影响。研究表明:干旱胁迫下,与对照相比,不施硅处理雷竹叶片可溶性糖、脯氨酸质量分数及过氧化物酶活性分别上升至487.89 molg-1,57.52 gg-1和178.125 molg-1min-1分别高出对照59.00%,38.47%和32.56%,过氧化氢酶活性下降至56.11 molg-1min-1,低于对照18.3%,光合作用显著受到抑制。施硅处理雷竹叶片可溶性糖、脯氨酸及过氧化物酶活性较不施硅处理雷竹叶片的显著降低,与处理2(PEG 6000)相比,处理3[PEG 6000+1.8 mmolL-1 Si(二氧化硅)]分别降低了50.31%,35.94%和50.88%;处理4[PEG 6000+5.4 mmolL-1 Si]分别降低了43.69%,44.77%和68.42%。同时,过氧化氢酶活性显著上升,与处理2(PEG 6000)相比,处理3上升21.91%;处理4上升25.87%,光合参数显著增强。干旱胁迫条件下施硅处理可以提高雷竹的抗旱性。图4表1参26

关 键 词:植物学        雷竹    干旱胁迫    生理生化指标    聚乙二醇
收稿时间:2012-11-19

Silicon and drought resistance of Phyllostachys violascens
PAN Yue,RONG Jieqing,SHENG Weixing,GUI Renyi.Silicon and drought resistance of Phyllostachys violascens[J].Journal of Zhejiang A&F University,2013,30(6):852-857.
Authors:PAN Yue  RONG Jieqing  SHENG Weixing  GUI Renyi
Affiliation:1.The Nurturing Station of the State Key Laboratory of Subtropical Silviculture,Zhejiang A & F University,Lin’an 311300,Zhejiang,China;2.Forest Enterprise of Jiande City,Jiande 311600,Zhejiang,China
Abstract:To clarify how silicon(Si) enhances resistance to drought stress,the effects of exogenous Si on physiological and biochemical characteristics,including soluble sugar content,proline (Pro) content,peroxidase(POD) activity,catalase(CAT) activity,and photosynthetic characteristics,of Lei bamboo (Phyllostachys violascens) were determined with drought stress induced by polyethylene glycol (PEG6000) in hydroponic conditions. Treatments were as follows:(1)Control,(2)PEG 6000,(3)PEG 6000 + 1.8 mmolL-1 Si,and (4)PEG 6000 + 5.4 mmolL-1 Si. Results showed that with drought stress, compared to the treatment 1,soluble sugar content increased to 487.89 molg-1(59.00%)(P<0.05),proline content to 57.52 gg-1 (38.47%)(P<0.05),and POD activity of treatment 2 to 178.125 nmol mg-1min-1(32.56%)(P<0.05),but CAT activity decreased to 56.11 molg-1min-1(18.30%)(P<0.05),and leaf photosynthesis was inhibited. With treatment 3 compared to treatment 2,exogenous Si decreased soluble sugar content (50.31%)(P<0.05),proline content (35.94%)(P<0.05),and POD activity (50.88%)(P<0.05);and with treatment 4 compared to treatment 2,exogenous Si decreased soluble sugar content(43.69%)(P<0.05),proline content (44.77%)(P<0.05),and POD activity (68.42%)(P<0.05). However, treatment 3 with exogenous Si increased CAT activity 21.9% more than treatment 2(P<0.05);and treatment 4 was 25.87% more than treatment 2(P<0.05). Exogenous Si also enhanced leaf photosynthesis. This indicated that Si could increase drought resistance of Lei bamboo.[Ch,4 fig. 1 tab. 26 ref.]
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