Effects of High Temperature on Embryological Development and Hormone Profile in Flowers and Leaves of Common Buckwheat (Fagopyrum esculentum Moench)

Agnieszka Płażek , Aneta Słomka , Przemysław Kopeć , Michał Dziurka , Marta Hornyák , Klaudia Sychta , Jakub Pastuszak , Franciszek Dubert

Abstract

Common buckwheat is a valuable crop, mainly due to the beneficial chemical composition of its seeds. However, buckwheat cultivation is limited because of unstable seed yield. The most important reasons for the low yield include embryo and flower abortion. The aim of this work is to verify whether high temperature affects embryological development in this plant species. The experiment was conducted on plants of a Polish cultivar ‘Panda’ and strain PA15, in which the percentage of degenerating embryo sacs was previously determined and amounted to 32% and 10%, respectively. The plants were cultivated in phytotronic conditions at 20 °C (control), and 30 °C (thermal stress). The embryological processes and hormonal profiles in flowers at various developmental stages (buds, open flowers, and wilted flowers) and in donor leaves were analyzed in two-month-old plants. Significant effects of thermal stress on the defective development of female gametophytes and hormone content in flowers and leaves were observed. Ovules were much more sensitive to high temperature than pollen grains in both genotypes. Pollen viability remained unaffected at 30 °C in both genotypes. The effect of temperature on female gametophyte development was visible in cv. Panda but not in PA15 buds. A drastic reduction in the number of properly developed embryo sacs was clear in open flowers at 30 °C in both genotypes. A considerable increase in abscisic acid in open flowers ready for fertilization may serve as a signal inducing flower senescence observed in the next few days. Based on embryological analyses and hormone profiles in flowers, we conclude that cv. ‘Panda’ is more sensitive to thermal stress than strain PA15, mainly due to a much earlier response to thermal stress involving impairment of embryological processes already in the flower buds.
Author Agnieszka Płażek (FoAaE / DoPP)
Agnieszka Płażek,,
- Department of Plant Physiology
, Aneta Słomka
Aneta Słomka,,
-
, Przemysław Kopeć
Przemysław Kopeć,,
-
, Michał Dziurka
Michał Dziurka,,
-
, Marta Hornyák (FoAaE / DoPP)
Marta Hornyák,,
- Department of Plant Physiology
, Klaudia Sychta
Klaudia Sychta,,
-
, Jakub Pastuszak (FoAaE / DoPP)
Jakub Pastuszak,,
- Department of Plant Physiology
, Franciszek Dubert
Franciszek Dubert,,
-
Journal seriesInternational Journal of Molecular Sciences, ISSN 1422-0067, (N/A 140 pkt)
Issue year2019
Vol20
No7
Pages1-18
Publication size in sheets0.85
Article number1705
Keywords in Englishabscisic acid; auxin; common buckwheat; cytokinins; embryo sacs; gibberellins; jasmonic acid; pollen grains; thermal stress; salicylic acid
ASJC Classification2700 General Medicine; 1312 Molecular Biology; 1503 Catalysis; 1604 Inorganic Chemistry; 1605 Organic Chemistry; 1606 Physical and Theoretical Chemistry; 1607 Spectroscopy; 1706 Computer Science Applications
DOIDOI:10.3390/ijms20071705
URL https://www.mdpi.com/1422-0067/20/7/1705/pdf
Internal identifierWRE/2019/25
Languageen angielski
LicenseJournal (articles only); author's original; Uznanie Autorstwa (CC-BY); after publication
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Effects of High Temperature on Embryological Development and Hormone Profile in Flowers and Leaves of Common Buckwheat (Fagopyrum esculentum Moench) of 06-02-2020
4,19 MB
Score (nominal)140
Score sourcejournalList
Publication indicators WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.224; WoS Impact Factor: 2018 = 4.183 (2) - 2018=4.331 (5)
Citation count*
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FinansowanieThis study was supported by funding of the National Centre of Knowledge of Poland (No. 2017/ 25/B/NZ9/00148).
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