| 镉胁迫对3个水稻品种(系)根系生长及有机酸和氨基酸分泌的影响 |
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| 引用本文： | 唐杰,徐浩洋,王昌全,王玉云,李冰,曹淋海.镉胁迫对3个水稻品种(系)根系生长及有机酸和氨基酸分泌的影响[J].湖南农业大学学报(自然科学版),2016,42(2):118-122. |
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| 作者姓名： | 唐杰 徐浩洋 王昌全 王玉云 李冰 曹淋海 |
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| 作者单位： | 1. 四川农业大学资源学院,四川成都,611130;2. 四川农业大学资源学院,四川成都611130;雅安市环境保护局,四川雅安625000;3. 四川农业大学资源学院,四川成都611130;邛崃市国土资源局,四川邛崃611530 |
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| 基金项目： | 国家科技支撑计划项目(2012BAD14B18)，四川省科技支撑计划项目(2013NZ0028) |
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| 摘 要： | 以水稻亲本蜀恢498、Ⅱ–32A和杂交稻Ⅱ优498为试材,通过营养液培养试验,研究不同镉胁迫时间(7、14 d)和不同质量浓度(0、0.5、1.0、3.0 mg/L,0为CK)Cd Cl2处理下的水稻根系生长情况以及根系有机酸和氨基酸的分泌特征。结果表明:与对照相比,在镉胁迫7 d和14 d时,各质量浓度的Cd Cl2处理下3个水稻品种(系)的根系干重减轻,根系总数变少,根系表面积和根系体积变小,根系总长变短,且对根系总数、根系总长、根系表面积等的影响达显著水平;当镉胁迫7 d和14 d时,蜀恢498、Ⅱ–32A和Ⅱ优498分泌的有机酸和氨基酸含量均随Cd Cl2质量浓度的增加呈先增加后减少的趋势,都在Cd Cl2质量浓度为0.5 mg/L时达最大,胁迫7 d时,3个品种(系)的有机酸含量分别为3.44、3.31和3.43 mg/g,氨基酸含量分别为41.07、42.03和40.53μg/g,胁迫14 d时,3个品种的有机酸含量分别为3.40、3.38和3.33 mg/g,氨基酸含量分别为34.95、35.95和35.28μg/g,各处理与对照相比,差异均达显著水平;分泌的有机酸组分中以草酸含量较高,其次是苹果酸;分泌的氨基酸组分中甘氨酸含量相对较高,其次是丝氨酸和苏氨酸;品种(系)间比较,在镉胁迫7 d和14 d,Cd Cl2质量浓度为0.5 mg/L时,3个品种(系)根系分泌的有机酸和氨基酸含量差异没有统计学意义,而在中浓度(1.0 mg/L)和高浓度(3.0 mg/L)镉胁迫下Ⅱ优498分泌有机酸和氨基酸含量显著高于其亲本蜀恢498和II–32A。
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| 关 键 词： | 水稻 镉胁迫 根系生长 有机酸 氨基酸 |
Organizational Modularity Upgrading of Strategic Emerging Industries Clusters--A Case Study on Hunan Construction Machinery Industry |
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| CAO Hongjian,LI Rui,HE Zhengchu.Organizational Modularity Upgrading of Strategic Emerging Industries Clusters--A Case Study on Hunan Construction Machinery Industry[J].Journal of Hunan Agricultural University,2016,42(2):118-122. |
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| Authors: | CAO Hongjian LI Rui HE Zhengchu |
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| Institution: | (1. Business school, Hunan Normal University, Changsha, Hunan410081, China; 2. School of Economics & Management, Changsha University of Science and Technology, Changsha, Hunan410114,China) |
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| Abstract: | The modular organization of industrial clusters can break the geographical and industrial restrictions and form a global modular network with high innovative capability and low transaction cost. Hunan construction machinery industry clusters has many obstacles including less collaborative innovative ability, serious homogenization of competition, weak supporting system and less developed service modules. It should upgrade R&D design modules and increase cooperative creativity; adjust hosting product''s structure and achieve a comprehensive upgrading; support the development of matching modules and accelerate the integration with related industries; build a Modular information network platform and improve resources integration ability of clusters. Studying on Hunan engineering machinery clusters'' upgrading has important enlightenment for the development of strategic emerging industries in central and western China. |
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| Keywords: | rice cadmium stress root growth organic acids amino acid |
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