WANG Peng,DENG Xiao-juan,HUANG Yian,et al.Roles of Soybean Roots in Tolerance to Cd and Seed Accumulation[J].Soybean Science,2014,33(06):928-931.[doi:10.11861/j.issn.1000-9841.2014.06.0928]
大豆镉抗性及籽粒积累的根系基础研究
- Title:
- Roles of Soybean Roots in Tolerance to Cd and Seed Accumulation
- 文章编号:
- 1000-9841.2014.06.0928
- Keywords:
- Soybean; Cd ; Root; Physiological mechanism
- 分类号:
- S565.1
- 文献标志码:
- A
- 摘要:
- 土壤镉(Cd)污染一方面会严重影响大豆的生长发育,另一方面通过土壤-根系积累在大豆籽粒中危及人体健康。选育高抗、低积累大豆品种是应对土壤镉污染的有效途径,了解大豆镉吸收、转运和分配的机制是开展大豆重金属高抗、低积累分子育种的前提。大豆根系是首先接触土壤的器官,也是镉吸收、转运和分配等重要生理活动发生的部位,因此是研究大豆镉抗性和积累的关注点。本文总结了大豆根系的形态、根系吸收、组织分配、固定去毒和木质部转运等方面在镉抗性和积累中所发挥的作用,通过比较不同大豆基因型根系在镉吸收、阻断、解毒和转运等方面的差异揭示了大豆镉抗性和积累机制的策略,为通过根系育种改良大豆抗污染及镉低积累的能力奠定基础。
- Abstract:
- Soybeans cultivation in the field contaminated with cadmium(Cd) faces two challenges:the first is the excessive soil cadmium will seriously impact soybean growth and development;the second is that Cd accumulation in seeds will threat the health of human being through the soil-root system.It is one of sustainable strategies to cultivate the tolerant and low accumulating soybean varieties in the field contaminated with Cd.Understanding the mechanism of uptake,translocation and contribution can help to improve the tolerance and accumulation.Soybean root is one of study focus because it is the organ interacted primarily with soil and play key roles in these processing,such as uptake,translocation and contribution.This article summarized the important roles of roots in cadmium absorption,cadmium detoxification,xylem transport,and also discussed the strategies which uncovered the mechanism of tolerance and low accumulation to cadmium by the comparison differences of roots in absorption,blocking,detoxification and transport between genotypes with contrast cadmium tolerance and accumulation.It may lay a foundation to improve the cadmium tolerance and low accumulation in soybean by root breeding.
参考文献/References:
[1]曾希柏,徐建明,黄巧云,等.中国农田重金属问题的若干思考[J].土壤学报,2013,50(1):186-194.( Zeng X B,Xu J M,Huang Q Y,et al.Some deliberations on the issues of heavy metals in farmlands of China[J].Journal of Soil,2013,50(1):186-194.)
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备注/Memo
基金项目:国家自然科学基金(31271745);国家“十二五”科技支撑计划(2011BAD35B06);国家高技术研究发展计划“863计划”(2012AA101106)。