Senescence of cut leaves of Zantedeschia aethiopica and Z. elliottiana. Part I. Chlorophyll degradation

• Autorzy: Skutnik E , Rabiza-Swider J , Wachowicz M , Lukaszewska A J

Warianty tytułu

PL

Starzenie cietych lisci Zantedeschia aethiopica i Z. elliottiana. Czesc I. Rozklad chlorofilu

• Języki publikacji: EN

Abstrakty

EN

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.

PL

Degradacja chlorofilu zachodząca w trakcie starzenia się ciętych liści regulowana jest przez fitohormony. W doświadczeniach analizowano zmiany zawartości chlorofilu w trakcie starzenia się ciętych liści dwóch gatunków stosowanych jako zieleń cięta (Zantedeschia aethiopica Spr. i Zantedeschia elliottiana Engl.) i wpływ BA (benzyloadeniny) i GA₃ (kwasu giberelinowego) na ten proces. Roztwory obu regulatorów wzrostu aplikowano w formie 24-godzinnego kondycjonowania (BA – 0,1 mmol·dm⁻³; GA₃ –0,25 mmol·dm⁻³). Kwas giberelinowy okazał się skuteczniejszy od benzyloadeniny w opóźnianiu rozkładu chlorofilu w przypadku obu gatunków, zwiększając tym samym ich trwałość. Pożywka standardowa, używana w celu przedłużenia pozbiorczej trwałości ciętych kwiatów, (8-HQC /cytrynian 8-hydroksychinoliny/ + 2% S /sacharoza/) istotnie przyspieszyła degradację chlorofilu w ciętych liściach Z. aethiopica, nie mając jednocześnie wpływu w przypadku Z. elliottiana. W obu jednak przypadkach pożywka osłabiła pozytywny wpływ GA₃ na końcową zawartość chlorofilu.

Słowa kluczowe

EN

leaf senescence; cut leaf; Zantedeschia elliottiana; benzyladenine; gibberellic acid; chlorophyll degradation; leaf; Zantedeschia aethiopica

• Wydawca: -
• Czasopismo: Acta Scientiarum Polonorum. Hortorum Cultus
• Rocznik: 2004
• Tom: 03
• Numer: 2
• Opis fizyczny: p.57-65,fig.,ref.

Twórcy

autor

Skutnik E

• Warsaw Agricultural University, Nowoursynowska 159, 02-787 Warsaw, Poland

autor

Rabiza-Swider J

• Warsaw Agricultural University, Nowoursynowska 159, 02-787 Warsaw, Poland

autor

Wachowicz M

• Warsaw Agricultural University, Nowoursynowska 159, 02-787 Warsaw, Poland

autor

Lukaszewska A J

• Warsaw Agricultural University, Nowoursynowska 159, 02-787 Warsaw, Poland

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