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Article
2023
Foliar humic acid and salicylic acid application stimulates physiological responses and antioxidant systems to improve maize yield under water limitations
Foliar humic acid and salicylic acid application stimulates physiological responses and antioxidant systems to improve maize yield under water limitations
Abstract (English)
Background: Humic acid (HA) is an organic acid that is naturally present in soil organic
matter and improves nutrient availability and the mechanisms involved in plant growth
and development. Likewise, salicylic acid (SA) is an important plant hormone involved in
the regulation of plant growth and development. A pot experiment was carried out to
determine the effects of individual or combined HA and SA application on growth and
yield of maize (Zea mays L.) under drought stress conditions. Two maize hybrids, namely,
30T60 (drought tolerant) and 75S75 (drought sensitive), were grown in semi-controlled
conditions and foliar applied with SA (1 mM), HA (100 mg L1 ) and their combination
(HA + SA). The plants were exposed to drought stress at the tasseling stage (R1, 60 days
after sowing) for 2 weeks, while control plants were given normal irrigation.
Results: The results showed that HA and SA applications significantly enhanced the gas
exchange characteristics (photosynthetic rate, transpiration rate, and stomatal conduc-
tance), and antioxidant activity (catalase, guaiacol peroxidase, and superoxide dismutase)
of water stressed maize plants. Foliar SA spray significantly increased the photosynthetic
efficiency and activity of enzymatic antioxidants closely followed by HA + SA applica-
tion that ultimately improved the yield and net benefit cost ratio of maize under water
deficit conditions.
Conclusion: Our findings suggest that foliar spraying of SA at the initiation of the repro-
ductive stage is a cost-effective strategy to obtain a high maize yield under limited water
conditions.
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JSFA reports, 3 (2023), 3, 119-128.
https://doi.org/10.1002/jsf2.106.
ISSN: 2573-5098
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630 Agriculture
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@article{Altaf2023,
url = {https://hohpublica.uni-hohenheim.de/handle/123456789/16357},
doi = {10.1002/jsf2.106},
author = {Altaf, Adnan and Nawaz, Fahim and Majeed, Sadia et al.},
title = {Foliar humic acid and salicylic acid application stimulates physiological responses and antioxidant systems to improve maize yield under water limitations},
journal = {JSFA reports},
year = {2023},
volume = {3},
number = {3},
}