Effects of colchicine and lumicolchicine on hypocotyl elongation, respiration rates and microtubules in gibberellic-acid-treated lettuce seedlings

✍ Scribed by B. Keith; L. M. Srivastava

• Book ID: 104750851
• Publisher: Springer-Verlag
• Year: 1978
• Tongue: English
• Weight: 438 KB
• Volume: 139
• Category: Article
• ISSN: 0032-0935
• DOI: 10.1007/bf00388644

✦ Synopsis

Gibberellic-acid (GA3)-induced hypocotyl elongation of intact lettuce (Lactuca sativa L.) seedlings was inhibited by colchicine (4×10(-4) M) but not by lumicolchicine (4×10(-4) M). In excised lettuce hypocotyls, GA3 (10(-5) M) increased respiration over water controls, while both colchicine and lumicolchicine alone, or in combination with GA3, reduced respiration. Microtubules were present in the hypocotyls of lumicolchicine-treated seedlings but absent in those treated with colchicine. It is suggested that lumicolchicine is a useful drug to discriminate between the metabolic and microtubule-mediated processes in cell morphogenesis.