期刊
MICROORGANISMS
卷 9, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/microorganisms9051041
关键词
endophytes; microbe-plant interactions; nitrogen fixation; nutrient exchange trap; root hairs; plant stress tolerance
类别
资金
- USDA-NIFA [W4147]
- New Jersey Agricultural Experiment Station
The research identified two chemical interactions between intracellular bacteria and plant cells, leading to nutrient exchanges and enhanced oxidative stress tolerance in plants. These interactions contribute to plant growth and the plants' ability to withstand abiotic and biotic stresses.
In this research, we conducted histochemical, inhibitor and other experiments to evaluate the chemical interactions between intracellular bacteria and plant cells. As a result of these experiments, we hypothesize two chemical interactions between bacteria and plant cells. The first chemical interaction between endophyte and plant is initiated by microbe-produced ethylene that triggers plant cells to grow, release nutrients and produce superoxide. The superoxide combines with ethylene to form products hydrogen peroxide and carbon dioxide. In the second interaction between microbe and plant the microbe responds to plant-produced superoxide by secretion of nitric oxide to neutralize superoxide. Nitric oxide and superoxide combine to form peroxynitrite that is catalyzed by carbon dioxide to form nitrate. The two chemical interactions underlie hypothesized nutrient exchanges in which plant cells provide intracellular bacteria with fixed carbon, and bacteria provide plant cells with fixed nitrogen. As a consequence of these two interactions between endophytes and plants, plants grow and acquire nutrients from endophytes, and plants acquire enhanced oxidative stress tolerance, becoming more tolerant to abiotic and biotic stresses.
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