Physiological and biochemical changes associated with cotton fiber development: IX. Role of IAA and PAA

摘要: Abstract Fibers of three cotton cultivars Gossypium hirsutum hybrid-4 (H-4), hybrid-8 (H-8), and G. arboreum Cot-15 were analyzed to study the role auxin in fiber elongation, vitro vivo. The exhibited variation final length. for growth, free conjugated indole acetic acid (IAA) content phenyl (PAA) during entire period their development. Antibodies against IAA PAA raised endogenous contents estimated by indirect ELISA. Cotton development is divided into four phases viz. (i) initiation (0–3 days post-anthesis (DPA)), (ii) elongation (3–24 DPA), (iii) secondary thickening (18–42 DPA) (iv) maturation (42 DPA onwards). During phase rapid cell water increased then decreased after entered phase, all cultivars. A positive correlation between length was observed. In grown fiber, media supplemented with or napthyl (NAA) significantly middle short staple cultivars, whereas promoted cultivar only. results cultured suggest an important development, which may help selection gene(s) better