| 干旱胁迫咖啡嫁接苗内源激素及生物量的变化 |
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| 引用本文： | 董云萍,林兴军,黄丽芳,谭军,李金芹,赵青云,黎秀元,龙宇宙.干旱胁迫咖啡嫁接苗内源激素及生物量的变化[J].热带作物学报,2022,43(2):311-320. |
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| 作者姓名： | 董云萍 林兴军 黄丽芳 谭军 李金芹 赵青云 黎秀元 龙宇宙 |
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| 作者单位： | 1.中国热带农业科学院香料饮料研究所/农业农村部香辛饮料作物遗传资源利用重点实验室/海南省热带香辛饮料作物遗传改良与品质调控重点实验室,海南万宁 5715332.云南农业大学热带作物学院,云南普洱 665099 |
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| 基金项目： | 云南省董云萍专家工作站(No.202105AF150081);国家自然科学基金项目(No.31901469);中国热带农业科学院基本科研业务费(No.1630142021013)。 |
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| 摘 要： | 为探明咖啡嫁接苗应对干旱胁迫其内源激素变化对植株生长的影响,布置了盆栽试验.接穗为中粒种咖啡'大丰1号',砧木分别为大粒种咖啡'查理种16号'(种间嫁接)和中粒种咖啡'热研2号'(种内嫁接),3种水分处理:(1)正常淋水土壤含水量(soil moisture content,SMC),18％≤SMC≤25％,(2)轻度...
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| 关 键 词： | 咖啡 嫁接苗 干旱胁迫 内源激素 |
| 收稿时间： | 2021-07-21 |
Effect of Drought Stress on Endogenous Hormone Content and Biomass of Coffee Grafted Seedlings |
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| DONG Yunping,LIN Xingjun,HUANG Lifang,TAN Jun,LI Jinqin,ZHAO Qingyun,LI Xiuyuan,LONG Yuzhou.Effect of Drought Stress on Endogenous Hormone Content and Biomass of Coffee Grafted Seedlings[J].Chinese Journal of Tropical Crops,2022,43(2):311-320. |
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| Authors: | DONG Yunping LIN Xingjun HUANG Lifang TAN Jun LI Jinqin ZHAO Qingyun LI Xiuyuan LONG Yuzhou |
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| Institution: | 1. Spice and Beverage Research Institute, Chinese Academy of Tropical Agricultural Sciences / Key Laboratory of Genetic Resources Utilization of Spice and Beverage Crops, Ministry of Agriculture and Rural Affairs / Key Laboratory of Genetic Improvement and Quality Regulation for Tropical Spice and Beverage Crops of Hainan Provincial, Wanning, Hainan 571533, China2. School of Tropical Crops, Yunnan Agricultural University, Pu’er, Yunnan 665099, China |
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| Abstract: | A pot experiment was conducted to study the response mechanism of endogenous hormones and plant growth of the grafted coffee seedlings under drought stress.Coffea canephora var.Dafeng No.1 was used as the scion,C.liberica var.Dewevrei No.16 and C.canephora var.Reyan No.2 as the rootstocks.The treatment included well-watered,soil moisture content (SMC),18%≤SMC≤25%,light water stress,17%≤SMC≤15%,severe water stress,10%≤SMC≤12%.There were three interspecific grafting,L1,L2,L3 and three intraspecific grafting,C1,C2,C3.IAA,ABA,TZR,IP in the root for the intraspecific grafted seedlings showed higher than those for the interspecific grafted seedlings under well-watered and light water stress.IAA,ABA,Zeatin and TZR in the leaves and roots of the interspecific grafted seedlings and IAA,ABA and Zeatin in the leaves of the intraspecific grafted seedlings responded positively to drought stress,but IAA,Zeatin and TZR in the roots of the intraspecific grafted seedlings responded negatively to drought stress.The IBA content in the roots of two grafted seedlings had different responses to drought stress.The IBA content in the roots of the interspecific grafted seedlings under severe drought was significantly lower than that under well-watered and light drought,while the IBA content in the roots of the intraspecific grafted seedlings under drought treatment was significantly higher than that under well-watered.ABA in the leaves and roots in both grafted seedlings increased significantly under drought stress.ABA in the leaves of L2 and L3 was 65.13%,218.52%higher than that of L1,ABA in the leaves of C2 and C3 was 31.10%,89.15%higher than that of C1.ABA in the roots L2 and L3 was7.71,9.05 times higher than that of L1,ABA in the roots of C2 and C3 was 1.79,1.48 times higher than that of C1.Under severe water stress,the leaf area loss rate significantly increased,the biomass in treatment L and C decreased 23.45%,20.14%compared with the well-watered.Under light water stress,the root diameter was thinner,the dry root weight,specific root length,specific root surface area for interspecific grafting was 39.16%,33.81%,28.07%higher than that under well-watered,root/shoot ratio was 0.66,significantly higher than that under well-watered (0.48).Correlation analysis showed that under drought stress,there was correlation between hormones changes and biomass.The overground biomass was negatively related to IAA,zeatin,ABA in leaves and ABA in roots.The root diameter was negatively correlated with the content of IAA,TZR,IP,ABA in roots.The number of lateral roots was positively correlated to IAA,Zeatin,TZR,IP,ABA in roots.In summary,under well-watered and light water stress,the root growth vigor of the intraspecific grafted seedlings was stronger than that of the interspecific grafted seedlings.IBA played a positive role tolerate drought for the intraspecific grafted seedlings.The role of ABA was essential for the drought tolerance of coffee.The root growth system of the interspecific grafted seedlings was better that that of the intraspecific grafted seedling under light drought.The study would lay an effective preliminary exploration to reveal the drought regulation mechanism of endogenous hormones in different coffee varieties and grafted seedlings. |
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| Keywords: | coffee grafted seedlings drought stress endogenous hormone |
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