Senescence o cut leaves of Zantedeschia aethiopica and Z. elliottiana. Part I. Chlorophyll degradation
Ewa Skutnik,
Warsaw Agricultural UniversityJulita Rabiza-Świder,
Warsaw Agricultural UniversityMariusz Wachowicz
Warsaw Agricultural UniversityAleksandra Łukaszewska
Warsaw Agricultural UniversityAbstract
Chlorophyll degradation occurring during leaf senescence in under control of plant hormones. Changes in the chlorophyll content and the effects of BA (benzyladenine) and GA3 (gibberellic acid) on this process were analyzed during senescence of cut leaves of Zantedeschia aethiopica Spr. and Zantedeschia elliottiana Engl., two species grown for the florists’ green. Both growth regulators were applied as 24 h pulse treatment: 0.25 mmol·dm-3 and 0.1 mmol·dm-3 for GA3 and BA, respectively. Gibberellic acid was more effective than benzyladenine in delaying senescence of both Zantedeschia species leaves by retarding chlorophyll loss. A standard preservative solution used to prolong longevity of cut flowers (8-HQC /citrate of hydroxyquinoline/ +2% S /sucrose/) radically accelerated chlorophyll loss of Z. aethiopica leaves but had no effect on pigment degradation in leaves of Z. elliottiana. However, in both species the preservative diminished the positive effect of GA3 treatment on final chlorophyll content.
Keywords:
chlorophyll degradation, cut leaves, florists’ green, gibberellic acid, benzyladenine, Zantedeschia aethiopica, Zantedeschia elliottianaReferences
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Warsaw Agricultural University
Warsaw Agricultural University
Warsaw Agricultural University
Warsaw Agricultural University
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