| 干旱胁迫对油茶叶片内源激素及果实生长的影响 |
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| 引用本文： | 丁少净,钟秋平,袁婷婷,曹林青,晏巢,袁雅琪.干旱胁迫对油茶叶片内源激素及果实生长的影响[J].林业科学研究,2016,29(6):933-939. |
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| 作者姓名： | 丁少净 钟秋平 袁婷婷 曹林青 晏巢 袁雅琪 |
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| 作者单位： | 中国林业科学研究院亚热带林业实验中心, 江西 分宜 336600;中国林业科学研究院亚热带林业实验中心, 江西 分宜 336600;中国林业科学研究院亚热带林业实验中心, 江西 分宜 336600;中国林业科学研究院亚热带林业实验中心, 江西 分宜 336600;中国林业科学研究院亚热带林业实验中心, 江西 分宜 336600;中国林业科学研究院亚热带林业实验中心, 江西 分宜 336600 |
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| 基金项目： | 国家公益性行业（气象）科研专项项目“油茶高产高效栽培气象保障关键技术研究”（GYHY201506053）。 |
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| 摘 要： | 目的]研究干旱处理中油茶叶片内源激素、果实生长的变化规律以及地表覆盖、土壤翻耕2种措施对缓解干旱胁迫的效果。方法]以6年生长林4#油茶为试验材料,设置自然状况、干旱胁迫、地表覆盖及土壤翻耕4个处理,采用酶联免疫吸附分析法(ELISA)测定油茶叶片内源激素,并分析果实的生长状况。结果]研究表明:(1)干旱胁迫开始两周后,即当土壤含水率低于24.0%~26.8%,油茶叶片内源激素开始启动对干旱的响应机制。(2)干旱胁迫使油茶叶片IAA含量下降,ABA含量上升,GA含量先上升后下降,ZR含量下降并维持在较低水平,ZR/IAA值下降;地表覆盖及土壤翻耕可以有效缓解干旱对叶片IAA、GA、ZR含量的影响,而对叶片ABA含量、ZR/IAA的影响不显著;油茶通过内源激素含量的变化来应对干旱胁迫的影响。(3)干旱胁迫使油茶果实横径减小,果实纵径出现负增长,而地表覆盖及土壤翻耕相对于干旱胁迫使得果实横径生长量分别增加了73.20%、75.58%,可以有效缓解干旱胁迫对油茶果实纵径生长的影响。结论]生产上通过地表覆盖及土壤翻耕可以有效缓解干旱对油茶果实生长的影响,地表覆盖技术措施可进一步推广应用。
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| 关 键 词： | 油茶 干旱胁迫 内源激素 果实生长 地表覆盖 土壤翻耕 |
| 收稿时间： | 2016/4/19 0:00:00 |
Effects of Endogenous Hormones on Camellia oleifera Leaves and Fruit Growth under Drought Stress |
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| DING Shao-jing,ZHONG Qiu-ping,YUAN Ting-ting,CAO Lin-qing,YAN Chao and YUAN Ya-qi.Effects of Endogenous Hormones on Camellia oleifera Leaves and Fruit Growth under Drought Stress[J].Forest Research,2016,29(6):933-939. |
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| Authors: | DING Shao-jing ZHONG Qiu-ping YUAN Ting-ting CAO Lin-qing YAN Chao and YUAN Ya-qi |
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| Institution: | Experimental Center for Subtropical Forestry, Chinese Academy of Forestry, Fenyi 336600, Jiangxi, China;Experimental Center for Subtropical Forestry, Chinese Academy of Forestry, Fenyi 336600, Jiangxi, China;Experimental Center for Subtropical Forestry, Chinese Academy of Forestry, Fenyi 336600, Jiangxi, China;Experimental Center for Subtropical Forestry, Chinese Academy of Forestry, Fenyi 336600, Jiangxi, China;Experimental Center for Subtropical Forestry, Chinese Academy of Forestry, Fenyi 336600, Jiangxi, China;Experimental Center for Subtropical Forestry, Chinese Academy of Forestry, Fenyi 336600, Jiangxi, China |
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| Abstract: | Objective] To study the changes of endogenous hormones and fruit growth under drought stress treatments and the effect of two measures on alleviating drought. Methods] 6-year-old Camellia oleifera forests were tested by applying natural condition, drought stress, covering straw and loosing soil. The endogenous hormones in leaves were studied by enzyme-linked immunosorbent assay (ELISA) and the fruit growth was also analyzed. Results] (1) When the soil moisture content was lower than 24.0%-26.8%, the endogenous hormones began to appear larger changes. (2) The IAA content in leaves decreased, the ABA content increased, the GA content increased at first and then decreased, the ZR content decreased and then maintained at a low level, and the ZR/IAA values decreased under drought stress. Covering straw and loosing soil could effectively mitigate the effects of drought stress on the contents of IAA, GA and ZR. It had little effects on the ABA content and ZR/IAA values; C. oleifera forests dealt with drought stress by the changing the endogenous hormone content. (3) The fruit width growth decreased under drought stress and the fruit height growth was negative. With covering straw and loosing soil, the fruit width growth increased by 73.20% and 75.58% respectively and these two measures effectively alleviated the effects of drought stress on fruit height. Conclusion] Production by the measures of covering straw and loosing soil can effectively alleviate the effects of drought stress on the fruit growth and covering straw as the best measure can be further applied. |
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| Keywords: | Camellia oleifera drought stress endogenous hormones fruit growth covering straw loosing soil |
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