Germination, alpha-, beta-amylase and total dehydrogenase activities of Amaranthus caudatus seeds under water stress in the presence of ethephon or gibberellin A3

• Autorzy: Bialecka B. , Kepczynski J.
• Języki publikacji: EN

Abstrakty

EN

Amaranthus caudatus L. seed germination was studied under different levels of water deficit induced by PEG 6000 in laboratory conditions. PEG at osmotic potentials -0.2 to -0.3 MPa at 24°C in darkness delayed germination and reduced final germination percentage. PEG solutions at osmotic potential lower than -0.3 MPa almost totally blocked seed germination. Ethephon was much more effective than GA3 in reversing PEG-caused inhibition of A. caudatus seed germination. PEG decreased α-amylase activity after 14 h incubation. It decreased β-amylase activity after 14 and 20 h, and caused an increase in total dehydrogenase activity only after 20 h of incubation. Unlike GA3, ethephon increased α-amylase activity in seeds after 12 and 14 h of incubation under water deficit. After 20 h of incubation there was no difference in α-amylase activity in any of the treatments. Neither ethephon nor GA3 affected the activity of β-amylase and dehydrogenase.

Słowa kluczowe

PL

Amaranthus caudatus; seed; germination; alpha-amylase activity; beta-amylase activity; dehydrogenase activity; water stress; ethylene; gibberellin A3; polyethylene glycol; ethephon; water deficit; laboratory condition; plant; environmental stress

• Wydawca: -
• Czasopismo: Acta Biologica Cracoviensia. Series Botanica
• Rocznik: 2010
• Tom: 52
• Numer: 1
• Opis fizyczny: p.7-12,fig.,ref.

Twórcy

autor

Bialecka B.

• Department of Plant Physiology and Biotechnology, University of Szczecin, Waska 13, 71-415 Szczecin, Poland

autor

Kepczynski J.

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