Effect of nutrients and growth regulating chemicals on biochemical aspects and hormonal balance with reference to apical dominance in mango.
Sivagami S., Vijayan K. P., Natarajaratnam N.
Author Affiliation: Department of Crop Physiology, Tamil Nadu Agricultural University, Coimbatore 641?003, India.
: 476-482
Abstract : Five-year-old trees of Neelum, Bangalora and Mulgoa mango were sprayed twice with urea (0.5%) and sucrose (0.5%), with 15 days between sprays, and then one month later with Cycocel (6000 p.p.m.) [chlormequat], TIBA (500 p.p.m.), Ethrel (2000 p.p.m.) [ethephon] or Alar (2500 p.p.m.) [daminozide]. The growth regulator treatments suppressed apical dominance and increased the number of flower buds formed, and increased the contents of total phenolics, soluble protein, abscisic acid and P, but decreased the levels of auxin and gibberellin-like substances in the leaves. Urea sprays increased leaf carbohydrate levels. The treatments had variable effects on levels of soluble sugars, N and K in leaves, and sometimes affected the cultivars in different ways.