Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2018, Vol. 34 ›› Issue (11): 6-12.doi: 10.11924/j.issn.1000-6850.casb17110069

Special Issue: 生物技术

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Physiological and Biochemical Characteristics of Plant Iron Nutrition in Calcareous Soil: Research Progress

  

  • Received:2017-11-18 Revised:2018-02-23 Accepted:2018-02-24 Online:2018-04-16 Published:2018-04-16

Abstract: The aim is to elucidate the physiological and biochemical mechanism that iron deficiency induced chlorotic symptom of plant in calcareous soil. We summarized that the bicarbonate changed soil pH value and then reduced the iron availability in soil, so that it limited the iron uptake in plants. Additionally, the bicarbonate stress induced a series of physiological and biochemical reactions in roots in response to the low iron habitat, including the roots secreting relative substances or proton to the rhizosphere soil to acidify soil, inducing the expression of ferric reductase gene and iron transporter gene to enhance iron reductase activity and iron uptake from soil. According to the characteristics of calcareous soil, the future research should be carried out on: (1) highlighting the effect of bicarbonate on iron transport from root to leaf to explain molecular mechanism of chlorotic symptom; (2) clarifying the effect of bicarbonate on the expression of ferritin gene in cell; (3) exploring the relationship between microorganisms and bicarbonate to reveal the characteristics of plant adaptation to calcareous soil.