Promotion of Growth and Invertase Activity by Gibberellic Acid in Developing Avena Internodes
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چکیده
منابع مشابه
Promotion of growth and invertase activity by gibberellic Acid in developing Avena internodes.
Gibberellic acid (GA(3)) induces invertase activity within 6 hours in Avena stem segments that are incubated in the dark at 23 degrees . The maximum amount of promotion is about 5 times that of invertase activity in untreated segments. GA(3) causes significant promotion of invertase activity at concentrations as low as 3 x 10(-5) mum GA(3). The increase in invertase activity elicited by GA(3) b...
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Gibberellic acid and sucrose play significant roles in the increases in invertase and growth in Avena stem segments. About 80% of invertase is readily solubilized, whereas the rest is in the cell wall fraction. The levels of both types of invertase change in a similar manner in the response to gibberellic acid and sucrose treatment. The work described here was carried out with only the soluble ...
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Three different invertases are found in the developing internodes of oat (Avena sativa cv. Victory). Two soluble invertases (I and II) are separable on diethylaminoethylcellulose and Sephadex columns. They are further distinguished by their kinetic constants, heat stability, and differences in stability and apparent activity optima in response to pH treatments. Relative activities of the two so...
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Kinetin at physiological concentrations causes significant reduction of GA3-promoted growth in excised Avena stem segments. Kinetin is therefore considered to be a gibberellinantagonist in this system. A Eineweaver-Burke plot reveals that kinetin acts non-competitively with GAa. The kinetin inhibition of GA3-promoted growth can be seen within 6 hours. It was found that soluble protein is marked...
متن کاملThe Effects of Growth Suhstances on Intercalary Growth and Cellular Differentiation in Developing Internodes of Avena sativa II. The Effects of GihhereUic Acid By
A substantial number of papers on the effects of f,'ibbereHic acid on cell division and cell elonf '̂iition have Mppeared in Ihe last several years (Allsopp 19fi'2. Beniier et al. 1904. Bradley and Crane !9(VJ, Bnrstrom 1960, Greulach and Haesloop 1958. Guttridf^e and Thomp.son 19fj3. Humphries and Wlieeiinler I9()0. Kato 1955. Odhnoff 19(58. Sach.s et (tl. 1959 «, h). Mosl of (hose investif^aii...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1968
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.43.1.29