C4 Photosynthetic Enzymes Engaged in the Habituation of Allium cepa L. Seedlings to Drought Stress

Q3 Pharmacology, Toxicology and Pharmaceutics

Current Trends in Biotechnology and Pharmacy Pub Date : 2021-05-31 DOI:10.5530/CTBP.2021.2.17

K. Riazunnisa, N. Rajesh, P. ChandramatiShankar, C. SurendranathaReddyE.

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Abstract

Drought is one of the major stress which affects agricultural crop productivity around the world. In this study the role of Phos phoenol pyruvate carboxylase (PEPC, EC 4.1.1.31), NADP-malic enzyme (NADP-ME, EC 1.1.1.40), and pyruvate, phosphate dikinase (PPDK, EC 2.7.9.1) in different onion cultivars (Allium cepa L.) under drought stress was investigated.An elevated specific activity of these three enzymes was monitored in onion cultivars after 8 h of drought stress. With the increasing concentration of drought there was an increase in C4 enzyme activities. PEPC showed 3.5-fold increase after 24 h, NADP-ME 3.9-fold, and PPDK 3.2-fold increase was observed in Arkalalima (AL)onion after 48 h when compared to control. Statistical analysis including regression analysis suggested significant results to onion drought resistant cultivars under drought stress condition. The results revealed that the variety AL exhibited best response followed by Arkakirthaman (AK) and Bellary(BL). Therefore PEPC, PPDK and NADPME participate in the drought response of onion, a C3 Plant. Future research will allow further understanding of the drought stress mechanism of adaptation of the onion germplasm to drought.

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C4光合作用酶参与洋葱幼苗对干旱胁迫的适应

干旱是影响世界各地农业作物生产力的主要压力之一。在本研究中，研究了不同洋葱品种（洋葱）在干旱胁迫下磷酸烯醇丙酮酸羧化酶（PEPC，EC 4.1.1.31）、NADP苹果酸酶（NADP-ME，EC 1.1.1.40）和丙酮酸、磷酸二激酶（PPDK，EC 2.7.9.1）的作用。在干旱胁迫8小时后，在洋葱品种中监测到这三种酶的比活性升高。随着干旱浓度的增加，C4酶活性增加。与对照相比，Arkalalima（AL）洋葱24小时后PEPC增加3.5倍，NADP-ME增加3.9倍，PPDK增加3.2倍。包括回归分析在内的统计分析表明，在干旱胁迫条件下，洋葱抗旱品种的结果显著。结果表明，AL表现出最好的反应，其次是Arkakirthaman（AK）和Bellary（BL）。因此，PEPC、PPDK和NADPME参与了C3植物洋葱的干旱反应。未来的研究将有助于进一步了解洋葱种质适应干旱的干旱胁迫机制。

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来源期刊

Current Trends in Biotechnology and Pharmacy Pharmacology, Toxicology and Pharmaceutics-Pharmaceutical Science

CiteScore

0.70

自引率

0.00%

发文量

期刊介绍： The Association of Biotechnology and Pharmacy (ABAP) will be useful to form a forum for scientists so that they can bring together to discuss and find scientific solutions to the problems of society. The annual meetings will help the members to share their knowledge and publish their research knowledge particularly by members and fellows of the Association and special care will be taken to provide an opportunity for young scientists. Besides this the association is planned to organize symposia, seminars and workshops on current developments of Biotechnology and Pharmacy particularly on the subject of current scientific interest, and the proceedings of which will be published regularly. And in view of the vast development of science and to disseminate the problems in publication of research work, an international journal of Current Trends in Biotechnology and Pharmacy has been started by ABAP.