C. Crisosto, P. Lombard, D. Sugar
Sep 1, 1988
Citations
0
Influential Citations
30
Citations
Journal
Journal of the American Society for Horticultural Science
Abstract
Putrescine at 10−5, 10−4, 10−3, and 10−2 m applied at anthesis increased fruit set of ‘Cornice’ pear (Pyrus communis L.) in 1985 and 1986. Ovule longevity and the effective pollination period were extended 2 days in 1985 and 5 days in 1986 by putrescine at 10−3 m. Pollen tubes reached the micropyle 2 days earlier in treated than in untreated flowers. High levels of evolved ethylene in flowers were related to pollination and fertilization and were unaffected by putrescine application. Increased ovule longevity and fruit set in treated flowers were associated with increased foliar and flower N and B levels after fertilization. Chemical name used: 1,4-diaminobutane dihydrochloride (putrescine).