Influence of 9-β-L(+)-adenosine on malate dehydrogenase activity in rice.
In: Physiologia Plantarum, Jg. 84 (1992-03-01), Heft 3, S. 460-466
Online
academicJournal
Zugriff:
The activity of malate dehydrogenase (MDH, EC 1.1.1.37) in rice (Oryza sativa L. cv. California M-201) roots was increased within 25 min by a foliar application of 37 nM of 9-β-L(+)-adenosine [L(+)-adenosine]. A similar concentration of 9-β-D(-)-adenosine [D(-)-adenosine] did not affect MDH. Triacontanol (2.7 nM) which elicits L(+)-adenosine in plants also increased MDH activity in roots of rice seedlings, whereas neither octacosanol nor a mixture of equimolar concentrations of triacontanol and octacosanol had any effect on MDH activity. L(+)-Adenosine increased MDH activity of rice seedlings grown at 10, 20 and 40°C. The effect was measurable 24 h after application at 10 and 20°C.. but not 6 h after treatment at 40°C. Ninety minutes after L(+)-adenosine was applied to the foliage of plants grown at 10, 20 and 40°C, MDH activity in the roots was 40, 30 and 9% more, respectively, than in the untreated controls. The concentration of water soluble protein was also increased by L(+)-adenosine and was positively correlated with MDH activity. When measured 90 min after application of L(+)-adenosine at different times of day, MDH activity and dry weight were increased most when L(+)-adenosine was applied 9 and 12 h after the lights came on in a 16-h photoperiod. The optimum light intensity for the response of rice to L(+)- adenosine, as measured by MDH activity, was 450 μmol m-2 s-1. [ABSTRACT FROM AUTHOR]
Titel: |
Influence of 9-β-L(+)-adenosine on malate dehydrogenase activity in rice.
|
---|---|
Autor/in / Beteiligte Person: | Savithiry, Srinivasan ; Wert, Violet ; Ries, Stanley |
Link: | |
Zeitschrift: | Physiologia Plantarum, Jg. 84 (1992-03-01), Heft 3, S. 460-466 |
Veröffentlichung: | 1992 |
Medientyp: | academicJournal |
ISSN: | 0031-9317 (print) |
DOI: | 10.1111/j.1399-3054.1992.tb04691.x |
Schlagwort: |
|
Sonstiges: |
|