Effect of phytochrome and kinetin on nitrite reductase activity in Zea mays

Sharma, Arun K. ; Sopory, Sudhir K. (1987) Effect of phytochrome and kinetin on nitrite reductase activity in Zea mays Plant and Cell Physiology, 28 (3). pp. 447-454. ISSN 0032-0781

Full text not available from this repository.

Official URL: http://pcp.oxfordjournals.org/content/28/3/447.sho...

Related URL: http://dx.doi.org/10.1093/pcp/pci114


Red light and kinetin (10 μm) increased nitrite reductase (NIR) activity by 85 and 47% respectively in excised leaves of etiolated Zea mays. The stimulatory effect of kinetin decayed slower than that of red light. Indoleacetic acid (10 μm) had no effect on NIR activity. In the presence of abscisic acid (10 μm), the kinetin stimulated increase in NIR activity was totally nullified, however, the red light irradiated plants retained 20-25% increase in NIR activity over the dark control. If ABA was given 2 h after kinetin treatment or red light irradiation, it totally blocked kinetin stimulation as noticed earlier, but red light stimulation was inhibited by only 11%. Kinetin-treated and the red light irradiated leaves showed 20-25% increase in nitrate accumulation, which was totally nullified by ABA. The experiments presented suggest an independent mode of signal transduction by kinetin and phytochrome in stimulating NIR activity.

Item Type:Article
Source:Copyright of this article belongs to Oxford University Press.
Keywords:ABA; Kinetin; Nitrite Reductase; Phytochrome Regulation; Zea mays
ID Code:49947
Deposited On:21 Jul 2011 09:15
Last Modified:21 Jul 2011 09:15

Repository Staff Only: item control page