Relation between nitrogen and ribulose-1,5-bisphosphate carboxylase in rice leaves from emergence through senescence

Amane Makino, Tadahiko Mae, Koji Ohira

Research output: Contribution to journalArticlepeer-review

191 Citations (Scopus)

Abstract

The relation between N content and ribulose-l,5-bisphosphate (RuBP) carboxylase protein was examined in the 12th leaf blade of rice. Plants were grown under different amounts of N after the emergence of the 12th leaf blade. RuBP carboxylase protein increased with leaf N during leaf expansion. The synthesis of RuBP carboxylase predominated during this period, and changes in the amounts of carboxylase synthesized until leaf death paralleled changes in the N influx to the leaves. When the carboxylase reached its maximum content, the proportion of RuBP carboxylase to leaf N was 27 to 28% irrespective of N treatment. As the leaf senesced, however, this proportion differed significantly with the treatment. It was higher in the N-deficient leaf than in the N-sufficient leaf. This was due to different patterns of RuBP carboxylase degradation for the treatments during senescence. RuBP carboxylase was degraded actively during the early stage of senescence in the N-sufficient leaf, whereas its degradation proceeded almost constantly in the N-deficient leaf during senescence.

Original languageEnglish
Pages (from-to)429-437
Number of pages9
JournalPlant and Cell Physiology
Volume25
Issue number3
Publication statusPublished - 1984 Apr 1

Keywords

  • 15N tracer
  • Leaf senescence
  • N economy
  • N treatment
  • Oryza sativa
  • Ribulose-1,5-bisphosphate carboxylase

ASJC Scopus subject areas

  • Physiology
  • Plant Science
  • Cell Biology

Fingerprint Dive into the research topics of 'Relation between nitrogen and ribulose-1,5-bisphosphate carboxylase in rice leaves from emergence through senescence'. Together they form a unique fingerprint.

Cite this