Journal
JOURNAL OF PLANT NUTRITION
Volume 36, Issue 11, Pages 1765-1779Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01904167.2013.807823
Keywords
catalase; citrus; nutrient acquisition; paclobutrazol; putrescine; peroxidase; salinity; sour orange; superoxide dismutase
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The effects of paclobutrazol (PBZ) and putrescine (Put) on antioxidant enzymes activity, proline contents and nutrients uptake were studied on salt tolerant citrus rootstock sour orange. Six-month-old nucellar seedlings grown in pots and subjected to three levels of PBZ and two levels each of salinity and Put for 90days. Seedlings treated with PBZ or Put alone or in combination had higher anti-oxidant enzymes activities, accumulation of proline and nutrients contents like potassium (K+) and calcium (Ca2+) under both saline and non-saline conditions. Further, application of PBZ or Put alone or in combination also reduced the accumulation of both Na+ and Cl- ions in leaves and roots in NaCl stressed seedlings. A combined application of 250mg L-1 PBZ and 50mg L-1 Put proved to be more effective in improving proline and Ca2+ content and restricting accumulation of Na+ ions in leaf tissues.
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