Wyniki wyszukiwania

1

Flower-promoting activity of gibberellin A3 in Pharbitis nil apex cultures exposed to various photoperiods

100%

Galoch E., Czaplewska J., Kopcewicz J.

Acta Physiologiae Plantarum

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1995

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tom 17

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nr 1

2

Mitotic activity as an early symptom of flower evocation in Pharbitis nil Chois

75%

Czaplewska J., Kopcewicz J.

Acta Physiologiae Plantarum

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1994

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tom 16

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nr 1

3

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Auxin increases the InJMT expression and the level of JAMe–inhibitor of flower induction in Ipomoea nil

63%

Kucko A., Czeszewska-Rosiak G., Wolska M., Glazinska P., Kopcewicz J., Wilmowicz E.

Acta Societatis Botanicorum Poloniae

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2017

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tom 86

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nr 1

Interactions among jasmonates and auxin in the photoperiodic flower induction of a short-day plant Ipomoea nil were examined. Therefore, we measured changes in jasmonic acid (JA) and jasmonic acid methyl ester (JAMe) levels in the cotyledons of I. nil during the inductive night, as well as the effects of indole-3-acetic acid (IAA) on their content. We noticed an interesting result, that IAA applied on the cotyledons of I. nil is an effective stimulator of JAMe production in seedlings cultivated under inductive night conditions. IAA treatment also significantly increased the transcriptional activity of InJMT (JASMONIC ACID CARBOXYL METHYLTRANSFERASE), while did not affect the expression of JA biosynthesis genes (lipoxyganease, allene oxide synthase, 12-oxophytodienoate reductase). These data, as well as the results of our previous research, suggest that exogenous IAA participates in I. nil flower induction process by stimulating InJMT expression and, as a consequence of that, enhancing the level of JAMe, a flowering inhibitor.

4

Involvement of ABA in flower induction of Pharbitis nil

63%

Wilmowicz E., Frankowski K., Glazinska P., Kesy J., Kopcewicz J.

Acta Societatis Botanicorum Poloniae

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2011

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tom 80

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nr 1

Flowering of plants is controlled by hormones among which both stimulators and inhibitors are present. The role of abscisic acid (ABA) in flower induction of the short day plant Pharbitis nil was shown in our experiments through exogenous applications and endogenous level determination of the hormone in cotyledons of seedlings grown under special light conditions. The application of ABA to cotyledons or shoot apices during the first half of a 24-h long inductive night inhibits flowering. The same compound applied towards the end of or after a 14-h long subinductive night increases the number of flower buds produced by these plants. Exposing P. nil seedlings at the beginning of a 24-h long inductive night to far red light (FR) decreases the level of endogenous abscisic acid in cotyledons and leads to flower inhibition. However, a pulse of red light (R) reversing the inhibitory effect of far red light on the flowering of P. nil increases the ABA content. The results obtained confirm previous observations that ABA may play a dual and an important role in the regulation of floral bud formation in P. nil. The flowering occurs when the level of endogenous abscisic acid is low at the beginning and is high toward the end of the inductive night.

5

Identification and preliminary characterization of activity of AtACS2 and AtACS6 homologue genes during different phases of flower induction in Pharbitis nil

51%

Frankowski K., Kesy J., Wojciechowski W., Nowakowska P., Kopcewicz J.

Biological Letters

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2005

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tom 42

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nr 2 Spec.Vol.

Ograniczanie wyników

2 Acta Physiologiae Plantarum

2 Acta Societatis Botanicorum Poloniae

1 Biological Letters

5 Kopcewicz J.

2 Czaplewska J.

2 Frankowski K.

2 Glazinska P.

2 Kesy J.

2 Wilmowicz E.

1 Czeszewska-Rosiak G.

1 Galoch E.

1 Kucko A.

1 Nowakowska P.

1 Wojciechowski W.

1 Wolska M.

1 2017

1 2011

1 2005

1 1995

1 1994

Flower-promoting activity of gibberellin A3 in Pharbitis nil apex cultures exposed to various photoperiods

Mitotic activity as an early symptom of flower evocation in Pharbitis nil Chois

Auxin increases the InJMT expression and the level of JAMe–inhibitor of flower induction in Ipomoea nil

Involvement of ABA in flower induction of Pharbitis nil

Identification and preliminary characterization of activity of AtACS2 and AtACS6 homologue genes during different phases of flower induction in Pharbitis nil