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Drought is one of the main abiotic stress factors affecting the geographical distribution of plants. Economic trees and horticultural plants with weak drought resistance consume more water resources and increase environmental pressure. Improving the drought resistance of plants is one of the keys to create environment-friendly plants. Polyploidization leads to changes in gene composition and expression pattern, which usually enhances drought adaptability. However, the underlying molecular mechanism of polyploid stress resistance enhancement is not clear at present. Lycium barbarum is a kind of Solanaceae plant widely cultivated in the saline alkali arid area of Northwest China. It has high medicinal value, ornamental value and the ability to resist abiotic stress. The study of polyploid drought resistance mechanism of Lycium with high resistance can better reveal the optimization range and potential mechanism of chromosome doubling.
Recently, horticulture research published on-line a research paper titled chrome doubling mediums superior drough tolerance in Lycium rutenicum via abscisic acid signaling by Chen Jinhuan research group of Beijing Forestry University, revealing the ABA signal regulation mechanism of chromosome doubling to optimize the drought resistance of Lycium barbarum.
In this study, several genotypes of Autotetraploid Lycium barbarum were created by using wild diploid black fruit Lycium barbarum. The tolerance ability of diploid and tetraploid plants under drought stress was evaluated. It was found that tetraploid Lycium barbarum had stronger Drought Adaptability and higher ABA level. At the same time, in the context of the full-length transcriptional spectrum obtained by SMRT sequencing, we detected the transcriptome and proteome of diploid and autotetraploid respectively, and found that the change of ABA synthesis and response pathway regulation characteristics may be the source of chromosome doubling to enhance drought resistance, and revealed the potential mechanism of drought resistance enhancement of Autotetraploid plants. The results can provide reference for the development and cultivation of water-saving and drought resistant economic crops and the creation of new horticultural crops in arid and rainless areas.
Fig.1: Phenotypic status under stress and ABA content determination in L. ruthenicum of different ploidies.
Fig.2: model for the internal mechanisms of ABA regulated stress resistance after chromosome doubling. Chen Jinhuan, associate professor of forest molecular design and breeding innovation center / National Engineering Laboratory of forest breeding, Beijing Forestry University, is the corresponding author of the paper, and Rao Shupei, doctoral candidate in forest genetics and breeding, is the first author. This research was supported by national key research and development program (No. 2018yfd1000607) and basic research fund of Central University (2016zcq05).
Article link:
https://www.nature.com/articles/s41438-020-0260-1
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About Horticulture Research
Horticulture research is an English journal jointly founded by Nanjing Agricultural University and Nature Publishing Group (now Springer nature), which is the only special issue in the field of horticulture under nature. All basic and theoretical research on horticultural crops can be contributed. The influencing factors of horticulture research, Kerui Wei'an jcr2018 are 3.640, which are located in the first horticultural area (the 3rd / 36th) and the first plant science area (the 32nd / 228Th). Journal division of Chinese Academy of Sciences in 2019 (Basic Edition): it is located in the first area of horticulture, the first area of plant science and the first area of agriculture and Forestry Science (top journal).
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