Nitrate Effect on Phytochrome-Mediated Germination in FernSpores: Investigations on the Mechanism of Nitrate Action

Haas, Christian; Scheuerlein, Robert

doi:10.1016/s0176-1617(11)80299-3

Cited by 14 publications

(11 citation statements)

References 27 publications

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“…, 1991). Recently, we demonstrated that NO: can have a pronounced enhancement effect in phytochrome-mediated spore germination in Dryopteris (Haas and Scheuerlein, 1991), and that the effect of N0.y could be substituted by other electron acceptors (Haas and Scheuerlein, 1991). Similar results have been obtained for induction of germination in seeds and turions.…”

Section: Discussionsupporting

confidence: 76%

“…Additionally, the NO.,effect was investigated for various periods of Rc was reached for both experimental conditions, and the NO, effect was no longer observable. Similar results have been gained for Rc-induced germination in Dryopteris (Haas and Scheuerlein, 1991). NaN03-concentration.…”

Section: The Effect Of N O On the Phytochrome-mediated Germinationsupporting

confidence: 85%

“…The pronounced NO,-effect, obtained for the presence of NO, only during preinduction, is in contrast to the characteristics found for the enhancement by NO5 for Dryopteris (Haas and Scheuerlein, 1991). It raises the question whether there exists a connection between the effect of NO, and the action of Pfr in Anemia, in general.…”

Section: The Effect Of N O On the Phytochrome-mediated Germinationmentioning

confidence: 73%

“…Trisphenyltetrazolium-chloride. For spores of Dryopteris we recently demonstrated that trisphenyltetrazoliurnchlorid (TTC) increased germination significantly (Haas and Scheuerlein, 1991). Thus, we now tested this compound also for the Pfrmediated germination of Anemia spores [ Fig.…”

Section: Stimulation Of R-induced Germination By Alternative Electronmentioning

confidence: 99%

“…The question whether a NOS-effect could be observed also in this case was even more interesting, as in Anemia the induction of the phytochrome-mediated germination required prolonged irradiations or intermittent R-pulses ( in increased germination by the addition of NO; could be demonstrated also in Anemia. Moreover, as in the case of Dryopteris (Haas and Scheuerlein, 1991), this effect could be seen only if the irradiation conditions were suboptimal, i.e. if only few intermittent R-pulses were applied or if the period of Rc abscissa (B).…”

Section: Time Of No;-addmentioning

confidence: 99%

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NITRATE EFFECT ON Pfr‐MEDIATED AND GA₃‐INDUCED GERMINATION IN SPORES OF Anemia phyllitidis (L.) Sw*

Haas¹,

Kopp²,

Scheruerlein

1992

Photochem & Photobiology

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Abstract— Spore germination in Anemia phyllitidis can be induced by red light (R) via the phytochrome system and by gibberellic acid (GA3) in the dark. An enhancing effect of NO3‐ions on the Pfr‐mediated germination could be demonstrated. This NO3‐effect was found to be pronounced during the preinduction phase and could be described by biphasic kinetics depending on the formation of Pfr by the R‐irradiation. Besides NO3, other electron accepting substances also increased germination significantly. In contrast to Pfr‐mediated germination, no enhancing effect by NO3 could be obtained for the GA3‐induced germination response. The application of an inhibitor of gibberellic acid synthesis, AMO1618, as well as the analysis of combined R and GA3 treatment, support the hypothesis that for germination of Anemia phyllitidis spores no synergism between the factors exists. Thus, it is proposed that the gibberellic acid receptor starts a signal‐transduction pathway resulting in germination which is in part independent of the Pfr‐mediated signal‐transduction chain. The NO3‐effect is specific for the Pfr‐mediated signal‐transduction chain.

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Section: Discussionsupporting

confidence: 76%

Section: The Effect Of N O On the Phytochrome-mediated Germinationsupporting

confidence: 85%

Section: The Effect Of N O On the Phytochrome-mediated Germinationmentioning

confidence: 73%

Section: Stimulation Of R-induced Germination By Alternative Electronmentioning

confidence: 99%

Section: Time Of No;-addmentioning

confidence: 99%

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NITRATE EFFECT ON Pfr‐MEDIATED AND GA₃‐INDUCED GERMINATION IN SPORES OF Anemia phyllitidis (L.) Sw*

Haas¹,

Kopp²,

Scheruerlein

1992

Photochem & Photobiology

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Phytochromgesteuerte Farnsporenkeimung

Scheuerlein

Haas²

1995

Biologie in unserer Zeit

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Im Entwicklungszyklus der Pflanzen treten verschiedene Formen von Fortpflanzungs und Verbreitungseinheiten, wie Pollen, Samen oder Sporen, auf. Sie dienen neben der Vermehrung und Ausbreitung in vielen Fällen auch der Überdauerung ungünstiger Lebensbedingungen. Demgemäß wird ihre Keimung durch eine Vielzahl von Außenfaktoren auf sehr mannigfaltige Weise beeinflußt. Die komplexen Vorgänge, die dabei ablaufen, sind Gegenstand intensiver Forschung, nicht zuletzt deshalb, weil gerade die Samenkeimung bei Nutzpflanzen für die landwirtschaftliche Produktion von großer Bedeutung ist. Dagegen sind Farne in wirtschaftlicher Hinsicht zwar nur von geringem Interesse, ihre Sporen bieten aber aufgrund ihrer Einzelligkeit im Vergleich zu den vielzelligen, komplex gebauten Samen erhebliche experimentelle Vorteile für die Analyse der Keimungsinduktion: So beeinflußt die Variation verschiedener Versuchsparameter, wie die Versuchstemperatur oder die Zusammensetzung des Kulturmediums, die zu untersuchende Zelle direkt und ohne wesentliche zeitliche Verzögerung. Die Dokumentation des Keimungsprozesses ist durch direkte, mikroskopische Beobachtung der lebenden Zelle möglich. Außerdem müssen Wechselwirkungen zwischen verschiedenen Geweben bei den einzelligen Farnsporen nicht berücksichtigt werden, und man kann aufgrund der geringen Sporengröße von etwa 50 μm im Labor mit sehr großen Stichprobenumfängen arbeiten [5, 22]. Bei unseren Ausführungen beschränken wir uns im folgenden auf die lichtinduzierte Keimung von Sporen der Gattung Dryopteris (Wurmfarn) [12]. Unser Interesse gilt der Charakterisierung des absorbierenden Pigmentsystems Phytochrom unter Berücksichtigung molekularbiologischer Fragestellungen sowie der Bedingungen, unter denen der Außenfaktor Licht perzipiert werden kann. Darüber hinaus untersuchen wir die modifizierende Wirkung weiterer Umweltfaktoren auf den lichtinduzierten Keimungsverlauf, der im folgenden durch eine Abfolge charakteristischer Differenzierungsschritte beschrieben wird.

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Seeking the Role of NO in Breaking Seed Dormancy

Giba

Grubišić²,

Konjević

Plant Cell Monographs

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Nitrate Effect on Phytochrome-Mediated Germination in FernSpores: Investigations on the Mechanism of Nitrate Action

Cited by 14 publications

References 27 publications

NITRATE EFFECT ON Pfr‐MEDIATED AND GA₃‐INDUCED GERMINATION IN SPORES OF Anemia phyllitidis (L.) Sw*

NITRATE EFFECT ON Pfr‐MEDIATED AND GA₃‐INDUCED GERMINATION IN SPORES OF Anemia phyllitidis (L.) Sw*

Phytochromgesteuerte Farnsporenkeimung

Seeking the Role of NO in Breaking Seed Dormancy

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Nitrate Effect on Phytochrome-Mediated Germination in FernSpores: Investigations on the Mechanism of Nitrate Action

Cited by 14 publications

References 27 publications

NITRATE EFFECT ON Pfr‐MEDIATED AND GA3‐INDUCED GERMINATION IN SPORES OF Anemia phyllitidis (L.) Sw*

NITRATE EFFECT ON Pfr‐MEDIATED AND GA3‐INDUCED GERMINATION IN SPORES OF Anemia phyllitidis (L.) Sw*

Phytochromgesteuerte Farnsporenkeimung

Seeking the Role of NO in Breaking Seed Dormancy

Contact Info

Product

Resources

About

NITRATE EFFECT ON Pfr‐MEDIATED AND GA₃‐INDUCED GERMINATION IN SPORES OF Anemia phyllitidis (L.) Sw*

NITRATE EFFECT ON Pfr‐MEDIATED AND GA₃‐INDUCED GERMINATION IN SPORES OF Anemia phyllitidis (L.) Sw*