[Biochemical aspects of growth-stimulating effects of steroid phytohormones on lupine plants].
Presowing treatment of seeds of lupine of various species and cultivars with brassinosteroids--homobrassinolide and epibrassinolide--caused an increase in protein content and a change in the proportion of some amino acids. Both hormones increased heterogeneity of high- and medium-molecular-weight nonhistone chromatin proteins but had no effect on the polypeptide profile of histones. Using epibrassinolide as an example, we showed that the brassinosteroid-induced increase in protein content in lupine seeds was due primarily to accumulation of the low-molecular-weight components of beta-conglutin. The content of some amino acids in both alpha- and beta-conglutins changed. These changes in protein metabolism correlated with an increase in the content of indoleacetic acid and a decrease in the content of abscisic acid.
Kandelinskaia
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OL
Topunov
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AF
Grishchenko
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ER
D000040:Abscisic Acid / Q000378:metabolism; D002778:Cholestanones / Q000494:pharmacology*; D002843:Chromatin / Q000378:metabolism; D006657:Histones / Q000378:metabolism; D007210:Indoleacetic Acids / Q000378:metabolism; D031297:Lupinus / Q000254:growth & development* / Q000378:metabolism; D010937:Plant Growth Regulators / Q000494:pharmacology*; D010940:Plant Proteins / Q000378:metabolism; D012639:Seeds / Q000378:metabolism*; D013256:Steroids / Q000494:pharmacology*
D002778:Cholestanones; D002843:Chromatin; D006657:Histones; D007210:Indoleacetic Acids; D010937:Plant Growth Regulators; D010940:Plant Proteins; D013256:Steroids; C030737:indoleacetic acid; D000040:Abscisic Acid; C070163:homobrassinolide