Induction of In Vivo Nitrate Reductase Activity in Corn

Date

5-1976

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Rosendo Palis

Abstract

Induced and endogenous leaf nitrate reductase activities (NRA1 and NRA3 respectively) of 3 corn varieties namely DMR1 DMR2 and Glutinous Synthetic grown at two nitrogen fertility levels were analyzed using the ordinary and modified induction methods. Samplings were done at 30, 45 and 67 days after planting. There was no significance between NRA3 of samples grown at 20kg N/ha and 40 kg N/ha. However, NRA3 decreases with increasing plant age.

Among the three varieties, Glutinous consistently gave the lowest activity while those of the two DMR varieties are almost the same.

NRA1 of the two induction methods fluctuate, being significantly higher in modified in the first sampling; no significant differences in the second and in the third sampling, it was in ordinary induction that higher NRA1 was obtained.

Higher nitrogen fertilizer resulted in higher NRA1 during the first and second sampling but no differences at the third sampling.

The ratio of NRA3 was higher in modified induction during the first and second sampling. It increased with increasing plant age, suggesting that there is N-insufficiency.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1976 A42 P86

Document Type

Thesis

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