Photosynthetica 2014, 52(3):475-478 | DOI: 10.1007/s11099-014-0044-7

Sodium bisulfite enhances photosynthesis in rice by inducing Rubisco activase gene expression

Y. Chen1, J. H. Jin1, Q. S. Jiang1, C. L. Yu1, J. Chen2, L. G Xu1, D. A. Jiang1,*
1 State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, China
2 Canal Street Agency, Yuhang District People's Government, Hangzhou, China

To investigate how bisulfite promotes photosynthesis, a pot experiment was conducted with rice (Oryza sativa L.) plants to determine Rubisco activity and content, and Rubisco activase (RCA) gene expression after spraying NaHSO3 on rice leaves. The NaHSO3 treatment promoted significantly net photosynthetic rate (P N), carboxylation efficiency, maximum carboxylation rate, ribulose-1,5-bisphosphate regeneration rate, initial Rubisco activity, and RCA protein and mRNA concentrations. Therefore, the NaHSO3 enhancement of P N could be directly attributed to induction of RCA gene expression both at the transcription and translation levels. Thus, the increased RCA regulated the initial Rubisco activity in vivo.

Keywords: carboxylation efficiency; grain yield; maximum carboxylation rate; photorespiration; RuBP regeneration rate

Received: October 22, 2013; Accepted: January 24, 2014; Published: September 1, 2014Show citation

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Chen, Y., Jin, J.H., Jiang, Q.S., Yu, C.L., Chen, J., Xu, L.G., & Jiang, D.A. (2014). Sodium bisulfite enhances photosynthesis in rice by inducing Rubisco activase gene expression. Photosynthetica, 52(3), 475-478. doi: 10.1007/s11099-014-0044-7.
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