Influence of Arbuscular Mycorrhizal Species on Photosynthetic Attributes of Groundnut under Drought Stress

Author: Y. Bhargavi*, K. Jayalalitha, B. Sreekanth, B. Venkateswarlu and M. Latha

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Abstract

Drought is a major limiting factor reducing the photosynthetic rate, gas exchange which in turn directly affect the yield of groundnut in arid regions. Mycorrhizae with their role in enhancing water uptake could be the potential inputs to reduce the negative impacts of drought stress. But, identifying the most effective mycorrhiza under drought stress is an important challenge ahead. Therefore, a study was undertaken at Agriculture College Farm, Bapatla, India during during rabi 2019-20 and 2020-21 to study the role of arbuscular mycorrhizal species on the photosynthetic attributes of groundnut under water stress. The experiment consisted of two main treatments (irrigation, water stress imposed at pegging and pod formation stages) and seven mycorrhizal treatments (No mycorrhizal application, soil application of Glomus fasciculatum, Glomus aggregatum, Glomus mosseae, Glomus intraradices, Gigaspora sps., Acaulospora sps. each @ 12.5 kg ha-1). Our findings revealed that the pho

Keywords

Gas exchange, net photosynthetic rate, stomatal conductance, groundnut, mycorrhiza

Conclusion

Photosynthesis and transpiration are the two important determinants of the crop growth and yield. In the present investigation, water stress substantially reduced the net photosynthetic rate, stomatal conductance and transpiration rate of groundnut. The mycorrhizal plants under water stress were recorded with higher net photosynthetic rate, stomatal conductance and transpiration rate compared to the non-mycorrhizal plants subjected to water stress. Among the mycorrhizal treatments, soil application of Glomus mosseae and Gigaspora sps. @ 12.5 kg ha-1 recorded superior performance in enhancing the net photosynthetic rate, stomatal conductance and transpiration rate of groundnut under water stress and were found to perform comparably to that of non-mycorrhizal plants under irrigation.

References

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How to cite this article

Bhargavi, Y., Jayalalitha, K., Sreekanth, B., Venkateswarlu, B. and Latha, M. (2021). Influence of Arbuscular Mycorrhizal Species on Photosynthetic Attributes of Groundnut under Drought Stress. Biological Forum – An International Journal, 13(3a): 723-73