Efficacy of Sulfur Supplementation for Improving Chromium Tolerance in Canola (Brassica napus L.)

Summera Jahan, Sumera Iqbal, Khajista Jabeen

Abstract


Canola (Brassica napus L.) is an important oil seed crop globally. Currently, the impact of sulphur feeding on physiological, phytohormonal, and yield aspects of canola (var. Pakola) under chromium (Cr) stress is being investigated. The pot trial was carried out in a completely randomized design (CRD). The pot soils were treated with two levels of chromium, low (40 ppm) and high (160 ppm), as well as two levels of sulphur, low (50 ppm) and high (150 ppm). Plants were sampled at both vegetative and reproductive phases. The results showed that chromium had a detrimental effect on relative water content, chlorophyll content, protein content, indole acetic acid (IAA), gibberellic acid (GA), 100 seed weight, and pod length compared to control plants. However, under chromium stress, sugar and proline levels, as well as abscisic acid (ABA), increased dramatically. However, sulphur supplementation, especially under low chromium stress, resulted in considerable improvements in relative water content, chlorophyll and carotenoid levels, protein content, number of branches/plants, number of pods/branches, number of seeds/pod, and 100 seed weight (g).The current study's findings show that sufur feeding helps to mitigate the negative effects of chromium stress on the physiological, biochemical, and yield aspects of canola.

Keywords


Phytohormones; Abiotic stress; Proline; Chlorophylls; Carotenoids

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DOI: https://doi.org/10.33687/planthealth.03.01.5372

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