文献类型： 外文期刊

第一作者： Mahmud, Eftekhar

作者： Mahmud, Eftekhar;Zhu, Hongju;Sajjad, Muhammad Zeeshan;He, Nan;Lu, Xuqiang;Liu, Wenge;Mahmud, Eftekhar;Zhu, Hongju;Lu, Xuqiang;Kaseb, Mohamed Omar

作者机构： Chinese Acad Agr Sci, Zhengzhou Fruit Res Inst, Henan Joint Int Res Lab South Asian Fruits & Cucur, Zhengzhou 450009, Peoples R China;Bangladesh Agr Res Inst, Gazipur 1701, Bangladesh;Chinese Acad Agr Sci, Zhongyuan Res Ctr, Xinxiang 453400, Peoples R China;Agr Res Ctr, Hort Res Inst, Cross Pollinated Plants Dept, Giza 12119, Egypt

关键词： watermelon; polyploidy; plant architecture; phytohormones

期刊名称：HORTICULTURAE （ 2023影响因子：3.1； 五年影响因子：3.1 ）

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年卷期： 2024 年 10 卷 6 期

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收录情况： SCI

摘要： Plant architecture includes traits such as plant height, stem diameter, and branching pattern, which have significant impacts on yield and fruit quality. Polyploidization can bring changes in plant architectural traits in different crops along with other agronomic and biochemical attributes; however, the specific physiological and biochemical mechanisms are still unclear. In this study, we utilized five watermelon lines: '91E7', 'Zhengzhou No. 3', 'Fanzu No. 1', 'Shenlong', and 'Houlv', along with their corresponding autopolyploid derivatives (diploid, autotriploid, and autotetraploid) to compare plant architecture differences in different polyploidy watermelon plants. The results showed that the growth habits of diploid, triploid, and tetraploid watermelon plants were noticeably different. Triploid and tetraploid watermelon plants had greater stem diameters and larger leaf sizes. The leaf angle was also larger in polyploid watermelons than in their diploid ancestor lines. Although vine length was significantly higher in diploid watermelon, there was no significant difference in node number, indicating that the short vine length was due to the short internodal length. The major differences between diploid and polyploid watermelon plants were found in the branching pattern, as diploid watermelon lines have more branching compared to their polyploid sister lines. Furthermore, we examined the phytohormone content of diploid, triploid, and tetraploid 'Fanzu No. 1'. The reasons for the selection of this material are its robust growth and profuse branching habit, which cause visible differences among the ploidy levels. Hormone analysis showed distinct variations in abscisic acid in the nodal and stem regions, gibberellin in the auxiliary bud regions, and brassinosteroids in the apical meristematic regions. The correlation coefficient also strongly correlated these hormones with architecture-related traits. Our findings indicated that gibberellin, ABA, and brassinosteroids might be associated with variations in plant architectural traits like branching, vine length, internodal length, stem thickness, and leaf angle among different ploidy levels of watermelon. The exogenous application of GA(3) showed a positive effect on branching, whereas ABA showed a negative effect on branching. The application of brassinosteroid at the apical meristem demonstrated its effect on leaf angle, leaf size, and internodal length. The results of this study can provide a theoretical reference and valuable insights into the link between plant architecture and ploidy levels.

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