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Respiratory changes associated with growth-regulator-delayed leaf yellowing in Easter lily

Franco, R.E. and Han, S. S.

Journal of the American Society for Horticultural Science. Vol: 122 Issue: 1 Pages: 117-121.

1997

บทคัดย่อ

Respiratory changes associated with growth-regulator-delayed leaf yellowing in Easter lily.

Senescence or excised Easter lily leaves is typically marked by a rise in respiration without a concomitant production of ethylene. Treating excised leaves with 500 mg.L-1 of gibberellic acid (GA3) or benzyladenine (BA) significantly delayed the onset of leaf yellowing, lowered the respiration rates by one-third to one-half, and markedly delayed the respiratory rise. Similar effects on respiration were detected in leaves treated with BA or GA3 before a week period of cold storage and in leaves treated after chlorosis had initiated. Results of this study indicate that excised Easter lily leaves respond to the growth regulators with a significant decrease in respiration rate.