Modification of cadmium toxicity in pea seedlings by kinetin

Abstract

The effect of foliar application of kinetin on the growth and some physiological processes of pea plants growing in soil supplemented with 25 or 50µM Cd were studied. Cadmium treatment inhibited the growth rate, chlorophyll (Chl) content, net photosynthesis (P N ), content of soluble sugars and free amino acids of either shoots or roots. The application of kinetin (kin) enhanced the growth rate, Chl content, P N , soluble sugars and free amino acids content of shoots and roots; dark respiration rate (R D ), contents of soluble protein and proline were increased by cadmium treatment. The addition of kinetin to Cd-stressed plant reduced R D , soluble protein and proline content. Considerable variations in the content of Na + , K + , Ca 2+ and Mg 2+ were induced by Cd-treatments. Foliar application of kinetin exhibited a favorable effect on the accumulation of some ions and antagonized or ameliorated the inhibitory effect of Cd stress on some others.

Modulation of zinc-induced oxidative damage in Solanum melongena by 6-benzylaminopurine involves ascorbate–glutathione cycle metabolism

“…Recently, some studies have revealed that CKs are involved in plant responses to heavy metal stresses (Al-Hakimi 2007;Lukatkin et al, 2007;Gemrotová et al, 2013;Pavlíková et al, 2014a,b;Singh and Prasad, 2014). Treatment of maize seeds with kinetin (a synthetic CK) resulted in relief of negative symptoms of Zn and nickel (Lukatkin et al, 2007).…”

Kinetin Supplementation Modifies Chromium (VI) Induced Alterations in Growth and Ammonium Assimilation in Pea Seedlings

“…Plant hormones have been reported as active members of signal transduction cascade involved in the plant stress responses [16]. Studies have shown that exogenous KN supplementation can promote growth and alleviate metal toxicity [17][18][19][20][21][22]. However, other works showed that KN if present in excess induces increased ethylene production, generation of ROS and alteration in antioxidant system which cause adverse effects on plant metabolism and may even lead to cell death [23][24][25].…”

Efficiency index as the integral indicator of Triticum aestivum response to growth regulators

“…Exogenous cytokinins application enhanced manganese (Mn) tolerance and the antioxidant defense system (Gangwar et al, 2010), reduced Cd-induced alterations (Al-Hakimi, 2007). Exogenous application of cytokinin-like PGR kinetin decreased toxic effects of cadmium (Cd) (Munzuroglu, Zengin, 2006), and thidiazuron had protective effect on cucumber seedlings exposed to heavy metals (Lukatkin et al, 2003).…”

“…The efficacy of kinetin and other cytokinin-like substances was evaluated according to the following parameters: in pea seedlings by the rate of growth, soluble sugars and chlorophyll content, and on the rate of photosynthesis (Al-Hakimi, 2007); in zucchini -on the rate of cell division and growth (Stoynova-Bakalova, Petrov, 2010); in Mexican Palo Verde -by alterations in catalase and ascorbate peroxidase activities (Zhao et al, 2011); in maize cucumber -by seed germination and growth of axial organs (Lukatkin et al, 2007); in cucumber -by superoxide generation, LPO intensity, carotenoid content in leaves (Bashmakov et al, 2012).…”