บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Indole-3-acetic acid (IAA) content and axillary bud development in relation to russet spotting in harvested iceberg lettuce.

Ritenour, M.A., Sutter, E. G., Williams, D. M. and Saltveit, M. E.

Journal of the American Society for Horticultural Science. Volume 121, Number 3, May 1996. Pages 543-547.

1996

บทคัดย่อ

Indole-3-acetic acid (IAA) content and axillary bud development in relation to russet spotting in harvested iceberg lettuce.

This study was undertaken to determine if endogenous IAA content and axillary bud development correlate with phenylalanine ammonia-lyase (PAL) induction and russet spotting (RS) susceptibility among RS susceptible and resistant cultivars of Iceberg lettuce (Lactuca sativa L.). Final levels of ethylene-induced PAL activity and RS development were highly correlated among cultivars, field conditions, and harvest dates. Harvested Iceberg lettuce midribs contained relatively low amounts of free IAA (maximum of 5.2 ng.g-1 fresh weight). There was poor correlation between free IAA content in lettuce leaf midribs and final RS development among all cultivars, growing conditions, and harvest dates. Axillary bud development, as measured by the number of visible buds per head, bud weight, or bud length, were not significantly correlated with final RS development or midrib IAA content. Cultivars with higher initial free IAA content lost much of their IAA after 8 days storage at 5C in air +/- ethylene.