2021
DOI: 10.1021/acs.jafc.1c02575
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Indigenous Proline is a Two-Dimensional Safety-Relief Valve in Balancing Specific Amino Acids in Rice under Hexavalent Chromium Stress

Abstract: This study highlights the roles of different N sources (N starvation [−N], nitrate [+NO 3 − ], and ammonium [+NH 4 + ]) in specific amino acids involved in rice proline (Pro) metabolism under hexavalent chromium [Cr(VI)] stress. In treatment with Cr(VI) − N, the content of glutamate (Glu) in shoots was comparable to that of Pro, while the content of Glu in the roots was significantly higher than that of Pro. In case of treatment with Cr(VI) + NO 3 − /NH 4 + , the content of Glu in both tissues was significantl… Show more

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Cited by 19 publications
(9 citation statements)
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“…The seeds of rice ( Oryza sativa L. XZX 45) were obtained from the Hunan Academy of Agricultural Sciences, which were prepared as described in our previous work ( Zhang et al, 2021 ). In brief, rice seeds were soaked for 12 h before cultivation, then placed in clean river sand inside plastic cups, and deployed in an artificial climate chamber to maintain stable running conditions (light: 20,000 lux, temperature: 25°C ± 0.5°C and humidity: 60% ± 2%).…”
Section: Methodsmentioning
confidence: 99%
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“…The seeds of rice ( Oryza sativa L. XZX 45) were obtained from the Hunan Academy of Agricultural Sciences, which were prepared as described in our previous work ( Zhang et al, 2021 ). In brief, rice seeds were soaked for 12 h before cultivation, then placed in clean river sand inside plastic cups, and deployed in an artificial climate chamber to maintain stable running conditions (light: 20,000 lux, temperature: 25°C ± 0.5°C and humidity: 60% ± 2%).…”
Section: Methodsmentioning
confidence: 99%
“…Two different treatments were conducted: (1) Cr(VI) treatment: 16-days old seedlings were grown in nutrient solution containing 0, 2.0, 8.0, and 16.0 mg Cr/L for 2-days exposure; (2) “Pro + Cr(VI)” treatment: 16-days old seedlings were first pretreated in Pro solution (1 mM) after soaking for 12 h ( Yang et al, 2021 ), and then transferred into the nutrient solution containing 0, 2.0, 8.0, and 16.0 mg Cr/L for 2-days exposure. Three different effective concentrations of Cr(VI; i.e., EC 20 , EC 50 , and EC 75 ) were used based on the inhibition rate with 20%, 50%, and 75% of relative growth rate during 2-days exposure ( Zhang et al, 2021 ). The pH of solution was approximately 6.7 to 6.9 during the entire period of exposure.…”
Section: Methodsmentioning
confidence: 99%
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