PJB-2021-516
Mitigation of drought induced effects in tomato (Solanum esculentum L.) using plant growth regulators
Amna Shahzadi, Khalid Hussain, Khalid Nawaz, Zainab Abdul Rouf, Mehreen Javeria, Iqra Iqbal, Noshia Arshad, Huma Riaz, Rida Akram, Rida Zainab and Durre Nayab
Abstract
Experiments were performed to mitigate the drought-induced effects in two tomato varieties (Rio Grande and Yaqui) using plant growth regulators i.e. indole-3-acetic acid (IAA) and naphthalene acetic acid (NAA). Drought stress (25 & 50%) reduced the growth, physiological, quality and yield attributes like the length of root and shoot, fresh and dry biomass of root ant shoot, chlorophyll pigments, proteins and carbohydrates contents, photosynthetic assimilation rate, rate of transpiration, intercellular CO2 and also stomatal conductance and fruit yield. Variety “Yaqui” showed more drastic effects of drought in response to growth and yield. Antioxidant activities of catalases (CAT), peroxidase (POD) and superoxide dismutase (SOD) were increased under drought stress. It was noted that drought levels (50%) showed more adverse effects as compared to 25% drought. Foliar applications of IAA and NAA overcome drought detrimental effect and enhanced the growth, quality and yield attributes that were severely affected by drought. The foliar application of NAA was more effective to overcome the drought effect than the IAA. It was concluded that the levels of drought stress (25 & 50%) markedly decreased the growth parameters, biochemical, physiological and yield attributes in both tomato varieties. Foliar applications of NAA and IAA mitigate the drought effects by increasing the growth, physiological attributes that resulted better yield of tomato under drought stress
To Cite this article:
Shahzadi, A., K. Hussain, K. Nawaz, Z.A. Rouf, M. Javeria, I. Iqbal, N. Arshad, H. Riaz, R. Akram, R. Zainab and D. Nayab. 2023. Mitigation of drought induced effects in tomato (Solanum esculentum L.) using plant growth regulators. Pak. J. Bot., 55(3): DOI: http://dx.doi.org/10.30848/PJB2023-3(7)
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