Biochemical and Physicochemical Background of Mammalian Androgen Activity in Winter Wheat Exposed to Low Temperature
PBN-AR
Instytucja
Instytut Fizjologii Roślin im. Franciszka Górskiego Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
JOURNAL OF PLANT GROWTH REGULATION (35pkt w roku publikacji)
ISSN
0721-7595
EISSN
1435-8107
Wydawca
SPRINGER
DOI
URL
Rok publikacji
2018
Numer zeszytu
1
Strony od-do
199-219
Numer tomu
37
Identyfikator DOI
Liczba arkuszy
0,5
Słowa kluczowe
angielski
Androstenedione
Frost resistance
Langmuir analysis
Phytohormones
Soluble sugars
Winter wheat
Open access
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Język
angielski
Treść
Understanding of the physiological role of mammalian hormone—androstenedione (AN)—in plants is scant and the mechanisms of its action at a cellular level are practically unknown. The aim of this study was to investigate the physicochemical and biochemical background of AN activity in winter wheat exposed to low temperature. Cold periods are important in the lifecycle of this species as they induce frost resistance and further generative development. Wheat seedlings (control and AN-supplemented) were acclimated 2 weeks in cold and then exposed to frost (−12 °C). AN supplementation reduced frost damages by 30%. Moreover, AN also accelerated generative development of wheat. The AN-induced changes in redox homeostasis seemed to be important for processes of acclimation to low temperature and generative induction. AN influenced hormonal balance in wheat and stimulated accumulation among other gibberellins and cytokinins. For example, in aerial part of plants, the content of GA3 was increased by AN in 12 days of cold by about 30%, whereas the content of cis-zeatin was increased by 65%. AN was absorbed into plant membranes (Langmuir bath studies). The membrane absorption of AN increased the distance between lipid molecules and this may be an important step in the AN-induced enhancement of frost resistance. AN interaction with lipid membranes showed similarity to the interactions of some known regulators stimulating flowering in plants, and thus it may also underlie the acceleration of wheat development. Androstenedione was naturally present in wheat leaves (5–21 pg g−1 FW).
Inne
System-identifier
PX-5ae0267fd5de8a486d9e0dbc
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