Dipanwita Datta, Mrinalini Manna, Hemangini Parmar, Sangeetha Karippadakam, Afreen Rashid, Sahil Mehta, Shambhu Krishan Lal, Ajay K. Venkatapuram, Jitender Singh, Malireddy K. Reddy, Srinivas Patnaik, V. Mohan M. Achary
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引用次数: 0
Abstract
Phosphite, a reduced form of phosphate, has been proposed to be a better source of phosphorus due to its high mobility in soil and can be used as an alternative fertilizer with herbicide for growing crops engineered with bacterial phosphite dehydrogenase protein from Pseudomonas stutzeri. This enzyme uses NAD as a cofactor and its overexpression could deplete the cellular NAD pool, creating pressure on other cellular biochemical reactions. To take advantage of both NAD and NADP, we mutated the native phosphite dehydrogenase gene for relaxed cofactor specificity and overexpressed it in rice plants. The engineered rice plants were found to metabolize phosphite efficiently. However, use of phosphite as a herbicide was not met by mutated phosphite dehydrogenase overexpressing plants as compared to the rice plants overexpressing wild type phosphite dehydrogenase. Therefore, we conclude that mutant phosphite dehydrogenase has potential industrial application for NADPH regeneration and its use for engineering crops for dual fertilization and weed control system is limited.
亚磷酸盐是磷酸盐的一种还原形式,由于其在土壤中的高流动性,被认为是一种更好的磷来源,可用作使用除草剂的替代肥料。这种酶使用 NAD 作为辅助因子,过度表达会耗尽细胞中的 NAD 池,给其他细胞生化反应带来压力。为了同时利用 NAD 和 NADP,我们突变了本地亚磷酸酯脱氢酶基因,放宽了辅助因子的特异性,并在水稻植株中过度表达。结果发现,改造后的水稻植株能高效地代谢亚磷酸酯。然而,与过表达野生型亚磷酸酯脱氢酶的水稻植物相比,过表达突变亚磷酸酯脱氢酶的植物无法满足将亚磷酸酯用作除草剂的要求。因此,我们得出结论,突变亚磷酸酯脱氢酶在 NADPH 再生方面具有潜在的工业应用价值,但其在作物工程中用于双重施肥和除草系统的应用是有限的。
期刊介绍:
Journal of Plant Biology, an official publication of the Botanical Society of Korea, is an international journal devoted to basic researches in biochemistry, cellular biology, development, ecology, genetics, molecular biology, physiology, and systematics of plants.
The Journal publishes the following categories of paper:
Original articles -- For publication in Journal of Plant Biology the manuscript must provide a significant new contribution to our understanding of plants. All areas of plant biology are welcome. No limit on the length, but a concise presentation is encouraged.
Reviews -- Invited by the EiC.
Brief Communications -- Concise but independent report representing significant contribution to plant science.
The Botanical Society of Korea was founded on November 30, 1957 to promote studies, disseminate and exchange information on the field of plant biology. The first issue of The Korean Journal of Botany, the official publication of the society, was published on April 1, 1958. It was published twice a year, but quarterly from 5th volume in 1962. In 1994, it was renamed to Journal of Plant Biology and published in English since 1996. The journal entered its 50th year of publication in 2007.