| 不同沙棘品种抗旱性的比较 |
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| 引用本文： | 何彩云,李梦颖,罗红梅,高国日,张建国.不同沙棘品种抗旱性的比较[J].林业科学研究,2015,28(5):634-639. |
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| 作者姓名： | 何彩云 李梦颖 罗红梅 高国日 张建国 |
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| 作者单位： | 中国林业科学研究院林业研究所, 国家林业局林木培育重点实验室, 北京 100091;中国林业科学研究院林业研究所, 国家林业局林木培育重点实验室, 北京 100091;中国林业科学研究院沙漠林业实验中心, 内蒙古 磴口 015200;中国林业科学研究院林业研究所, 国家林业局林木培育重点实验室, 北京 100091;中国林业科学研究院林业研究所, 国家林业局林木培育重点实验室, 北京 100091;南京林业大学南方现代林业协同创新中心, 江苏 南京 210037 |
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| 基金项目： | 林业公益性行业科研专项(201504103);中央级公益性科研院所基本科研业务费专项资金项目(RIF201404) |
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| 摘 要： | 沙棘抗旱性是多因素作用的结果,如果只利用单因素/单项指标评价其抗逆性,则具有一定的片面性。本研究对干旱胁迫下4个沙棘品种的多项生理生化指标的变化进行比较分析,并通过主成分分析和综合评价发现:乡土中国沙棘(河北丰宁种源)品种的抗旱性最强,引进大果沙棘―乌兰格木品种的抗旱性最差,引进的4个沙棘品种抗旱能力强弱的排序为:丰宁(0.619)> 楚伊(0.445)> 向阳(0.390)> 乌兰格木(0.274)。净光合速率、蒸腾速率、气孔导度、叶水势、谷胱甘肽还原酶和脱落酸的含量可作为沙棘抗旱性的判定指标。随着干旱胁迫的加剧,与对照相比,4个引沙棘品种的净光合速率、蒸腾速率、气孔导度和叶水势均下降,而超氧化物歧化酶活性、细胞膜透性、谷胱甘肽还原酶和四大激素均上升,这说明干旱逆境胁迫影响了沙棘正常的生长发育过程,同时通过内在的生理生化指标的改变来增加其自身对逆境胁迫的抵抗能力。这些将为沙棘抗旱树种的筛选和进一步的杂交育种提供依据。
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| 关 键 词： | 沙棘 干旱胁迫 抗旱能力 |
| 收稿时间： | 2014/11/5 0:00:00 |
Comprehensive Evaluation on Drought Resistance of Hippophea rhamnoides |
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| HE Cai-yun,LI Meng-ying,LUO Hong-mei,GAO Guo-ri and ZHANG Jian-guo.Comprehensive Evaluation on Drought Resistance of Hippophea rhamnoides[J].Forest Research,2015,28(5):634-639. |
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| Authors: | HE Cai-yun LI Meng-ying LUO Hong-mei GAO Guo-ri and ZHANG Jian-guo |
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| Affiliation: | Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China;Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China;Experimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou 015200, Inner Mongolia, China;Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China;Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China;Collaborative-Innovation Center of Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, Jiangsu, China |
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| Abstract: | The drought resistance of Hippophea rhamnoides relates to the effects of multiple factors. It is one-sided to evaluate its resistance using single factor (single indicator). The drought resistance based on physiological and chemical indices in four H. rhamnoides species was evaluated by principal components analysis and subordinate function analysis. The results showed that the native species (H. rhamnoides ssp. Sinensis, Fengning; FN) had the strongest drought resistance compared with the other three exotic species (H. rhamnoides ssp. Mongolia, Xianyang, XY; H. rhamnoides ssp. Mongolia, Chuyi, CY; and H. rhamnoides ssp. Mongolia, Wulangemu,WL). The H. rhamnoides L. Wulangemu had the weakest drought resistance. And the capacity of drought resistance of the four species is gauged as follows: FN (0.619) > CY (0.445) > XY (0.390) > WL (0.274). It was also found that the net photosynthetic rate, transpiration rate, stomatal conductance, leaf water potential, glutathione reductase and ABA content could be used as the indicators to determine the drought resistance. In addition, with the increasing of drought stress, the net photosynthetic rate, transpiration rate, stomatal conductance, water potential decreased, while the catalase activity, cell membrane permeability, glutathione reductase and the four kinds of hormones increased. This implies that the growth and development process of H. rhamnoides was affected under the drought stress, and they increased their own resistant ability through the internal physiological and chemical indicators changing. These will provide a scientific basis for drought-resistant species selection and cross-breeding of H. rhamnoides. |
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| Keywords: | Hippophea rhamnoides drought stress drought resistance capacity |
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