Chromium (VI) Induced Biochemical Changes and Gum Content in Cluster Bean (Cyamopsis tetragonolobaL.) at Different Developmental Stages

Abstract

Chromium (Cr) contamination by various industries and other activities is known to inhibit plants growth and development. The present study was conducted using pot experiments in a net house to determine the effect of Cr (VI) on biochemical parameters such as photosynthetic pigments, reducing sugars, and important minerals at different stages of growth in leaves, stem, and roots of clusterbean, a multipurpose fodder crop including a source of guar gum. Guar gum content was estimated in seeds at maturity. All biochemical contents showed a great variation with respect to increase in Cr concentration at different stages of growth. The levels of K, Fe, and Zn decreased, while Cr and Na content increased with increase in Cr concentration. Cr induced toxicity in clusterbean appears at 0.5 mg Cr (VI) Kg−1 soil with maximum inhibitory effect at 2 mg Cr (VI) Kg−1 soil, where impaired sugar supply resulted in decreased guar gum synthesis and altered micronutrient content. The study reveals the possible role of these biochemical parameters in decreasing plant growth and development under heavy metal stress.

Bioavailability of cadmium and nickel to Daucus carota L. and Corchorus olitorius L. treated by compost and microorganisms

“…Cd toxicity is a problem of increasing significance for ecological, evolutionary, nutritional, and environmental reasons. High Cd accumulations in the plants adversely affect the absorption and transport of essential elements (Sangwan et al, 2013). Different plant processes such as respiration, photosynthesis, water and nutrient uptake of plants are badly affected by Cd (Kuo and Kao, 2004).…”

Acidified Cow Dung-Assisted Phytoextraction of Heavy Metals by Ryegrass from Contaminated Soil as an Eco-Efficient Technique

“…In the current study, a significant correlation was observed between the applied acidified cow dung slurry (alone and in combination with molasses and SOB) and the photosynthetic attributes of the ryegrass plant, where the maximum improvement in the plant physiology was observed in the product P4, which was comprised of sulfur-amended CD slurry, SOB, and molasses (as a C source). The harmful impacts of heavy metals on plant physiology might be ascribed to a disturbance in mineral uptake under stressed conditions, which may have disturbed enzyme activities and subsequently decreased the biosynthesis of photosynthetic pigments [56,57]. Moreover, Bashir et al [57] reported that the combined application of biochar and elemental sulfur in the presence of SOB mitigated the adverse impacts of Cr on the maize physiology and improved the chlorophyll contents and the efficiency of the photosynthetic apparatus.…”

Interactive effects of salicylic acid on enzymes of nitrogen metabolism in clusterbean (Cyamopsis tetragonoloba L.) under chromium(VI) toxicity

“…Therefore, strategies are needed to alleviate the adverse effects of Cr toxicity, and also to decrease the Cr level in crops which may be helpful to minimize health risks and improvement of plant growth and development (Sangwan et al 2013). Plant hormones have been reported as active members of signal transduction cascade involved in the plant stress responses responses (Mori and Schroeder, 2004).…”