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Influence of silicon and chitosan on growth and physiological attributes of maize in a saline field

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Abstract

Soil salinity is the main constraint for crop productivity in many parts of the world. Application of silicon (Si) and chitosan (Chi) can improve crop growth under saline soil conditions. The current study was aimed to examine the effects of Si and Chi on mitigation of salinity, morphological and physiological attributes as well as the antioxidant system of maize (Zea mays L.) under saline soil conditions. A field experiment was conducted that comprised of nine treatments as follows: (i) Control (no amendment), (ii) Silicon 40 kg ha−1 (Si1), (iii) Chitosan 15 kg ha−1 (Chi1), (iv) Si1 + Chi1, (v) Silicon 80 kg ha−1 (Si2), (vi) Chitosan 30 kg ha−1 (Chi2), (vii) Si2 + Chi2, (viii) Si1 + Chi2 and (ix) Si2 + Chi1. Application of Si and Chi substantially improved the morphological and physiological attributes as well as antioxidant enzymes such as superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) of maize plants, and combined application of Si and Chi was more effective when compared with Si and Chi treatments separately. Membrane stability index was improved by 25%, relative water content by 26%, chlorophyll a by 69% and b by 56% with combined application of Si and chitosan (Si2 + Chi2) compared with control. The SOD, POD and CAT increased by 36%, 38% and 65% with Si2 + Chi2 compared with control. The results suggest that Si and Chi application is the possible option for alleviating salinity stress in maize plant. Further research is suggested to examine Si and Chi effects on various crop's growth.

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Funding

The financial support from Bahauddin Zakariya University Multan, Pakistan is greatfully acknowledged.

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  1. Department of Soil Science, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University Multan, Multan, Pakistan

    Hafiza Samra Younas, Muhammad Abid, Muhammad Shaaban & Muhammad Ashraf

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  1. Hafiza Samra Younas
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  2. Muhammad Abid
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  3. Muhammad Shaaban
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  4. Muhammad Ashraf
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Correspondence to Muhammad Abid or Muhammad Shaaban.

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Younas, H.S., Abid, M., Shaaban, M. et al. Influence of silicon and chitosan on growth and physiological attributes of maize in a saline field. Physiol Mol Biol Plants 27, 387–397 (2021). https://doi.org/10.1007/s12298-021-00940-4

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