Beata Maciejewska

Nicolaus Copernicus University

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Jan Kopcewicz

Nicolaus Copernicus University

Jacek Kęsy

Nicolaus Copernicus University

Emilia Wilmowicz

Nicolaus Copernicus University

Kamil Frankowski

Nicolaus Copernicus University

Paulina Glazińska

Nicolaus Copernicus University

M. Zelinska

Nicolaus Copernicus University

Magdalena Szumilak

Nicolaus Copernicus University

Magdalena Sidłowska

Agata Kućko

Warsaw University of Life Sciences

Krzysztof Kawałowski

Nicolaus Copernicus University

Cooperative Institutions

Nicolaus Copernicus University

University of Warmia and Mazury in Olsztyn

Michigan State University

Warsaw University of Life Sciences

University of Gdańsk

Sanofi (Mexico)

Sanofi (United States)

University of North Carolina at Chapel Hill

South College

Johns Hopkins University

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Rola jasmonianów w regulacji rozwoju generatywnego

Kosmos (2012)

Emilia Wilmowicz Agata Kućko Magdalena Sidłowska Kamil Frankowski Beata Maciejewska

Jasmonates are phytohormones conditioning proper functioning of separate plant development stages. Jasmonates precursor is ?-linolenic acid. Their biosynthesis occurs in three subcellular structures: chloroplasts, peroxisomes and cytosol. This paper summarizes the most recent achievements on participation of jasmonates in the field of reproduction of plants. Jasmonates hinder florescence among the most species of plants. However, researches carried out over rape indicate that the role of these compounds in generative induction is not explicit, i.e. they may speed up the growth of flowers in certain circumstances. Jasmonates are also very important in a process of proper formation of sterile and fertile parts of flower, as well as in opening flower buds. Furthermore, jasmonic acid (JA) nascent in a thread rod synchronizes maturation of pollen grains with the process of opening anthers and flowers. On the basis of gene expression pattern DAD1 analysis (the one that encodes an enzyme involved in the first stage of jasmonates formation), there was created a model of water transport regulation by JA to the stamens and petals of the crown. In addition, it was observed that one of the bioactive forms of jasmonic acid (JA-Ile) acts as an intermediary molecule in the secretion of nectar, regulated by the light. JA-Ile increases in the secretion of nectar in plants cultivated in the light and does not cause its decrease in plants cultivated in the dark. Inhibition of the JA-Ile biosynthesis in the light reduces the secretion of nectar. This result can be inverted by the application of JA-Ile.

Jasmonic acid

Jasmonate

Endomembrane system

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Ethylene and IAA interactions in the inhibition of photoperiodic flower induction of Pharbitis nil

Plant Growth Regulation (2008)

Jacek Kęsy Beata Maciejewska Magdalena Sowa-Kućma Magdalena Szumilak Krzysztof Kawałowski

Pharbitis nil

Flower induction

Plant Physiology

10.1007/s10725-008-9256-9

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Citations (31)

The level of jasmonates in phloem exudates and cotyledons of short-day plant Pharbitis nil

Polish Journal of Natural Sciences. Supplement (2003)

Beata Maciejewska Jacek Kęsy Emilia Wilmowicz Jan Kopcewicz

Pharbitis nil

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Independent effects of jasmonates and ethylene on inhibition of Pharbitis nil flowering

Acta Physiologiae Plantarum (2010)

Jacek Kęsy Emilia Wilmowicz Beata Maciejewska Kamil Frankowski Paulina Glazińska

Interactions between methyl jasmonate (JA-Me) and ethylene in the photoperiodic flower induction of short-day plant Pharbitis nil were investigated. Both JA-Me and gaseous ethylene applied during the inductive long night caused a decrease in the number of flower buds generated by P. nil. Application of ethylene did not affected niether the level of endogenous jasmonates in the cotyledons during the 16 h long inductive night, nor the inhibitory effect of JA-Me on the flowering of P. nil accompanied by variations in ethylene production. The application of acetylsalicylic acid (aspirin)—a jasmonate biosynthesis inhibitor—slightly stimulated flowering. Our results have shown that the mechanisms of P. nil flower inhibition by jasmonates and ethylene are independent.

Pharbitis nil

Methyl jasmonate

Jasmonate

Plant Physiology

Flower induction

10.1007/s11738-010-0649-9

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Citations (12)

Inhibitory Effect of Methyl Jasmonate on Flowering and Elongation Growth in Pharbitis nil

Journal of Plant Growth Regulation (2002)

Beata Maciejewska Jan Kopcewicz

Pharbitis nil