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EFFECTS OF SOME GROWTH REGULATORS ON TILLER BUD ELONGATION IN CEREALS
Author(s) -
JOHNSTON G. F. S.,
JEFFCOAT B.
Publication year - 1977
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1977.tb02201.x
Subject(s) - tiller (botany) , gibberellic acid , shoot , biology , elongation , apical dominance , cytokinin , botany , agronomy , auxin , biochemistry , germination , materials science , gene , metallurgy , ultimate tensile strength
SUMMARY The effects of foliar and root applied 6‐benzylamino‐9‐(tetrahydropyran‐2‐yl)‐9H‐purine (PBA), 6‐benzylamino‐purine (BAP), indole‐3‐acetic acid (IAA) or gibberellic acid (GA 3 ) on tiller bud growth were examined in cereal seedlings. Generally IAA and GA 3 inhibited tiller bud growth whilst the synthetic cytokinins both markedly promoted growth. Some observations on stem and root growth were also recorded. The results are discussed with respect to the diversion of both assimilates and cytokinins and appear to favour the view that tiller bud development is controlled by a competition for assimilates with the roots and main shoot.