| PEG胁迫对不同椰枣品种耐旱生理的影响 |
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| 引用本文： | 张宁,徐中亮,符海泉,ABDELAAL W B,李东霞,王义,王富有.PEG胁迫对不同椰枣品种耐旱生理的影响[J].热带作物学报,2021,42(8):2283-2288. |
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| 作者姓名： | 张宁 徐中亮 符海泉 ABDELAAL W B 李东霞 王义 王富有 |
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| 作者单位： | 1.中国热带农业科学院椰子研究所,海南文昌 5713002.海南省南繁生物安全与分子育种重点实验室,海南三亚 5720003.埃及农业发展中心椰枣研究与产业发展中心实验室,埃及吉萨 114354.国家热带棕榈种质资源圃,海南文昌 571300 |
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| 基金项目： | 中国热带农业科学院基本业务费专项“椰枣高效再生体系器官直接发生最佳外植体的筛选”(1630152020010);“一带一路”热带项目(BARTP-06);海南省自然科学基金项目(319QN325) |
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| 摘 要： | 为了评价‘Sewi’‘Helali’‘Khadrawy’3个椰枣品种的耐受干旱胁迫能力,本研究采用不同浓度的聚乙二醇（PEG）进行胁迫处理,探讨不同品种椰枣种子、椰枣幼苗在聚乙二醇胁迫下生长指标和生理指标的变化特征。结果显示：在种子萌发阶段,‘Khadrawy’在高浓度PEG胁迫下种子萌发率最高,‘Sewi’次之;在幼苗期,3个品种在受到15%PEG和25%PEG胁迫时,‘Khadrawy’鲜株重和根长均最大,其耐受渗透胁迫能力最强,叶片中生理指标脯氨酸含量较高,丙二醛含量较低,因此‘Khadrawy’在高浓度PEG胁迫下生长量大,渗透调节能力最强,‘Sewi’耐胁迫能力次之,‘Helali’较差。综上结果,‘Khadrawy’品种可能更适合干旱地区种植,比如海南的乐东、东方、三沙市和三亚等常年干旱少雨地域,盐碱化地域种植,而‘Helali’可能更适合有一定降水量但降水量较少地域种植,比如海南昌江、陵水,云南元江等。
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| 关 键 词： | 椰枣 聚乙二醇 胁迫 脯氨酸 丙二醛 |
| 收稿时间： | 2020-08-27 |
Physiological Effects of PEG Stress on Drought Tolerance of Different Date Palm |
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| ZHANG Ning,XU Zhongliang,FU Haiquan,ABDELAAL W B,LI Dongxia,WANG Yi,WANG Fuyou.Physiological Effects of PEG Stress on Drought Tolerance of Different Date Palm[J].Chinese Journal of Tropical Crops,2021,42(8):2283-2288. |
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| Authors: | ZHANG Ning XU Zhongliang FU Haiquan ABDELAAL W B LI Dongxia WANG Yi WANG Fuyou |
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| Institution: | 1. Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, Hainan 571300, China2. Hainan Key Laboratory for Biosafety Monitoring and Molecular Breeding in Off - season Reproduction Regions, Sanya, Hainan 572000, China3. Central Laboratory for Date Palm Research and Development of Agriculture Research Center, Giza 11435, Egypt4. National Tropical Palm Germplasm Reserve, Wenchang, Hainan 571300, China |
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| Abstract: | In order to evaluate the drought stress tolerance of three date palm cultivars (‘Sewi’ ‘Helali’ ‘Khadrawy’), different concentrations of PEG were used for stress treatment to discuss the characteristics of growth index and physiological index changes of date palm seeds and seedlings of different varieties under PEG stress. ‘Khadrawy’ had the highest seed germination rate under high PEG stress, followed by ‘Sewi’ cultivars. At the seedling stage, when the three cultivars were subjected to 15% PEG and 25% PEG stress, the fresh plant weight and root length of ‘Khadrawy’ were the highest, the osmotic stress tolerance ability was the strongest, the physiological index content of proline was high, and the content of malondialdehyde (MDA) was low. Therefore, ‘Khadrawy’ had a large growth capacity and the strongest osmotic regulation ability under high concentration PEG stress, ‘Sewi’ was the second, and ‘Helali’ was the third. In conclusion, ‘Khadrawy’ may be more suitable for planting in arid regions, such as Ledong, Dongfang, Sansha and Sanya in Hainan, which are perennial arid and rainless, and salinization regions, while ‘Helali’ may be more suitable for planting in regions with a certain amount of precipitation but less precipitation, such as Changjiang, Lingshui in Hainan and Yuanjiang in Yunnan. |
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| Keywords: | date palm PEG stress proline malondialdehyde (MDA) |
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