Molecular Biology of Abiotic Stress Tolerance in Brassica Crops

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Crop Breeding and Genetics".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 1662

Special Issue Editors

Oil Crops Research, Hunan Agricultural University, Changsha 410128, China
Interests: abiotic and biotic stresses in Brassica napus
School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China
Interests: molecular regulation; stress resistance; crop efficient nutrient use
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Special Issue Information

Dear Colleagues,

Brassica crops are important oil and vegetable crops worldwide. Abiotic stresses such as heat, cold, drought, waterlogging, salt-alkaline, and heavy metal toxicity are the major environmental factors limiting the growth, productivity and quality of Brassica crops. An improved understanding of the molecular biology of abiotic stress tolerance may contribute to efficient breeding strategies in abiotic-stress-tolerant Brassica crop cultivars.

We invite you to contribute to this Special Issue with a genetic, genomic, or molecular biological study of the tolerance of Brassica crops to abiotic stresses. We welcome submissions of original research and reviews.

Prof. Dr. Xin He
Dr. Yingpeng Hua
Guest Editors

Manuscript Submission Information

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Published Papers (1 paper)

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Research

10 pages, 3304 KiB  
Communication
Isolation of Three Metallothionein Genes and Their Roles in Mediating Cadmium Resistance
by Pei-Hong Zhang, Xue-Jie Zhang, Ting-Wei Tang, Heng-Liang Hu, Ning-Ning Bai, Da-Wei Zhang, Shuan Meng and Jia-Shi Peng
Agronomy 2022, 12(12), 2971; https://doi.org/10.3390/agronomy12122971 - 26 Nov 2022
Cited by 5 | Viewed by 1273
Abstract
Isolating the genes responsible for cadmium (Cd) accumulation and tolerance in oilseed rape and uncovering their functional mechanism is of great significance for guiding genetic improvement to cope with heavy metal pollution. In this study, we screened the cDNA library of Brassica napus [...] Read more.
Isolating the genes responsible for cadmium (Cd) accumulation and tolerance in oilseed rape and uncovering their functional mechanism is of great significance for guiding genetic improvement to cope with heavy metal pollution. In this study, we screened the cDNA library of Brassica napus cv. Westar using a yeast genetic complementation system and isolated BnMT2-22a, BnMT2-22b and BnMT3b, which can mediate Cd tolerance in yeast. They all have two cysteine-rich domains in their sequence. Ectopic expression of these MTs demonstrated that all of them enhanced Cd and Cu tolerance in yeast, but had no effect on Mn and Zn tolerance. The fusion of the red fluorescent protein mRFP did not affect their function in mediating Cd tolerance, and using these functional fusion proteins we observed that they were all localized in cytosol. Meanwhile, their expression in yeast did not affect the accumulation of Cd in the yeast transformants. Gene expression analyses found that BnMT2-22a, BnMT2-22b and BnMT3b were all induced by Cd in roots, and BnMT3b was also significantly induced in shoots. These results indicate that the genes BnMT2-22a, BnMT2-22b and BnMT3b isolated with cDNA library screening can mediate Cd tolerance, and they may detoxify Cd via cytosolic chelation. Full article
(This article belongs to the Special Issue Molecular Biology of Abiotic Stress Tolerance in Brassica Crops)
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