. "P(IAA600380507), V, Z(AV0Z50380511)" . "cotyledons; cytokinins; dark treatment"@en . . . "The effects of short-term darkening and methyl jasmonate (MeJA) on cotyledon senescence were studied 24 h after transfer of intact 7-day-old Cucurbita pepo (zucchini) seedlings to darkness or spraying with 100 mu M MeJA. The jasmonate inhibitory effect on chlorophyll content and chloroptast transcriptional activity was stronger compared with darkness. Further, MeJA reduced the photosynthetic rate whereas darkness did not affect photosynthesis. Neither stress factor affected the photochemical quantum efficiency of photosystem II (PSII) estimated by the variable fluorescence (F-v)/maximal fluorescence (F-m) ratio, suggesting the existence of mechanisms protecting the functional. activity of PSII at earlier stages of senescence, thus making this parameter more stable compared to others used to quantify senescence. Both stress factors caused a decrease in the content of physiologically active cytokinins, especially trans-zeatin (Z), with the jasmonate effect being much more pronounced when compared to ..." . . . "Mishev, K." . "Journal of Plant Physiology" . "Methyl jasmonate is a more effective senescence-promoting factor in Culcurbita pepo (zucchini) cotyledons when compared with darkness at the early stage of senescence"@en . . "9" . . "Ananieva, K." . "RIV/61389030:_____/07:00099663!RIV08-AV0-61389030" . . "433141" . "RIV/61389030:_____/07:00099663" . "Malbeck, Ji\u0159\u00ED" . "Aplikace roztoku metylesteru kyseliny jasmonov\u00E9 (100 \u00B5M) na sedmidenn\u00ED rostliny tykve bylo v\u00EDce \u00FA\u010Dinn\u00E9 p\u0159i indukci senescence d\u011Bloh rostlin tykve ne\u017E sedmidenn\u00ED zatemn\u011Bn\u00ED intaktn\u00EDch rostlin. Urychlen\u00E9 st\u00E1rnut\u00ED d\u011Bloh se projevilo sn\u00ED\u017Een\u00EDm obsahu chlorofylu, transkrip\u010Dn\u00ED aktivity chloroplast\u016F a rychlosti fotosynt\u00E9zy. \u017D\u00E1dn\u00FD z t\u011Bchto dvou stresov\u00FDch faktor\u016F nep\u016Fsobil na fotochemickou \u00FA\u010Dinnost fotosyst\u00E9mu II, ale oba stresov\u00E9 faktory sni\u017Eovaly obsah fyziologicky aktivn\u00EDch cytokinin\u016F, tj. rostlinn\u00FDch hormon\u016F zpomaluj\u00EDc\u00EDch st\u00E1rnut\u00ED rostlinn\u00FDch pletiv a org\u00E1n\u016F. V\u00FDsledky nazna\u010Duj\u00ED, \u017Ee oba stresov\u00E9 faktory urychluj\u00ED senescenci d\u011Bloh p\u016Fsoben\u00EDm na sni\u017Eov\u00E1n\u00ED hladin cytokinin\u016F p\u0159i \u010Dem\u017E jasmon\u00E1t je \u00FA\u010Dinn\u011Bj\u0161\u00EDm stresorem ne\u017E tma."@cs . . "Methyl jasmonate is a more effective senescence-promoting factor in Culcurbita pepo (zucchini) cotyledons when compared with darkness at the early stage of senescence" . . "The effects of short-term darkening and methyl jasmonate (MeJA) on cotyledon senescence were studied 24 h after transfer of intact 7-day-old Cucurbita pepo (zucchini) seedlings to darkness or spraying with 100 mu M MeJA. The jasmonate inhibitory effect on chlorophyll content and chloroptast transcriptional activity was stronger compared with darkness. Further, MeJA reduced the photosynthetic rate whereas darkness did not affect photosynthesis. Neither stress factor affected the photochemical quantum efficiency of photosystem II (PSII) estimated by the variable fluorescence (F-v)/maximal fluorescence (F-m) ratio, suggesting the existence of mechanisms protecting the functional. activity of PSII at earlier stages of senescence, thus making this parameter more stable compared to others used to quantify senescence. Both stress factors caused a decrease in the content of physiologically active cytokinins, especially trans-zeatin (Z), with the jasmonate effect being much more pronounced when compared to ..."@en . "Kam\u00EDnek, Miroslav" . "1179;1187" . . . . "Metylester kyseliny jasmonov\u00E9 je \u00FA\u010Din\u011Bj\u0161\u00EDm faktorem urychluj\u00EDc\u00EDm senescenci d\u011Bloh rostlin Cucurbita pepo (tykev) ne\u017E tma"@cs . . "2"^^ . "PT - Portugalsk\u00E1 republika" . "Metylester kyseliny jasmonov\u00E9 je \u00FA\u010Din\u011Bj\u0161\u00EDm faktorem urychluj\u00EDc\u00EDm senescenci d\u011Bloh rostlin Cucurbita pepo (tykev) ne\u017E tma"@cs . "van Staden, J." . "0176-1617" . . "Methyl jasmonate is a more effective senescence-promoting factor in Culcurbita pepo (zucchini) cotyledons when compared with darkness at the early stage of senescence" . . "Methyl jasmonate is a more effective senescence-promoting factor in Culcurbita pepo (zucchini) cotyledons when compared with darkness at the early stage of senescence"@en . "Ananiev, E. D." . "164" . . "7"^^ . "[3062B2B17962]" . "Georgieva, K." . . . "9"^^ .