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1. Ethylene insensitive mutation increases Arabidopsis tolerance to Cd in NPR1-dependent manner

Author:
Yutong Zhou; Chuan Liu; Guangzhe Li; Lin Hao
Source:
Plant and soil 2019 v.441 no.1-2 pp. 49-69
ISSN:
0032-079X
Subject:
Arabidopsis; aerial parts; antioxidant activity; beta-fructofuranosidase; cadmium; cadmium chloride; cell walls; chelation; enzyme activity; enzyme inhibitors; ethylene; gene expression; gene expression regulation; genes; genotype; growth retardation; mutation; pectinesterase; plant growth; plant response; proteasome endopeptidase complex; protein degradation; roots; transcription (genetics); ubiquitin; vacuoles
Abstract:
... BACKGROUND AND AIMS: Ethylene-insensitive mutation (ein)-conferred Arabidopsis tolerance to Cd has been reported. However, the mechanisms involved are far from clear. This study explores possible mechanisms. METHODS: Arabidopsis wild-type (WT), and ein2–1, npr1–1 (nonexpressor of PR gene 1), and npr1–1/ein2–1 (abbreviated to n1e2) were exposed to 50 μM CdCl₂ for 48 h or 7 d (just for assessment of ...
DOI:
10.1007/s11104-019-04080-3

2. A unique aluminum resistance mechanism conferred by aluminum and salicylic-acid-activated root efflux of benzoxazinoids in maize

Author:
Zunkang Zhao; Xiaofeng Gao; Ye Ke; Minmin Chang; Lu Xie; Xiaofeng Li; Minghua Gu; Jiping Liu; Xinlian Tang
Source:
Plant and soil 2019 v.437 no.1-2 pp. 273-289
ISSN:
0032-079X
Subject:
aluminum; benzoxazinoids; biosynthesis; chelation; corn; cultivars; exudation; hydroxamic acids; root growth; root tips; salicylic acid
Abstract:
... BACKGROUND AND AIMS: Although aluminum (Al) exclusion via root exudation of organic matters is a common resistance mechanism adopted by many plant species, whether root exudation of benzoxazinoids, such as hydroxamic acids (HAs), confers Al resistance remains unclear. METHODS: We performed physiological characterization for an Al-resistant maize cultivar TY and a sensitive maize cultivar ZD. RESUL ...
DOI:
10.1007/s11104-019-03971-9