Photosynthetic Enzyme Accumulation during Leaf Development of Arundinella hirta, a C4 Grass Having Kranz Cells not Associated with Veins

Masataka Wakayama, Ueno Osamu, Jun Ichi Ohnishi

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The leaf of the NADP-malic enzyme type C4 grass, Arundinella hirta, has not only mesophyll cells (MCs) and bundle sheath cells (BSCs, usual Kranz cells) but also another type of Kranz cells (distinctive cells; DCs) that are not associated with vascular bundles. We investigated photosynthetic enzyme accumulation along the base-to-tip maturation gradient of developing leaves by immunogold electron microscopy. In mature leaves, phosphoeno/pyruvate carboxylase (PEPC) and ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco) were detected in the MC cytosol and in the BSC and DC chloroplasts, respectively. Pyruvate, Pi dikinase (PPDK) was present in the chloroplasts of all photosynthetic cells but with higher levels in the MCs. Rubisco was first detected in the basal region of emerging leaf blades where the BSCs and DCs became discernable. Subsequently, the accumulation of PEPC and PPDK was initiated in the region where the granal proliferation in the chloroplasts was conspicuous; and, suberized lamellae were formed in the cell walls of the Kranz cells. There was no difference in the patterns of cellular development and enzyme accumulation between the BSCs and DCs or between the MCs adjacent to each type of Kranz cells. These results demonstrate that, although the DCs are not associated with veins, they behaved like BSCs with respect to enzyme induction and cellular differentiation.

Original languageEnglish
Pages (from-to)1330-1340
Number of pages11
JournalPlant and Cell Physiology
Volume44
Issue number12
DOIs
Publication statusPublished - Dec 1 2003
Externally publishedYes

Fingerprint

Arundinella hirta
leaf development
plant veins
Poaceae
Veins
Mesophyll Cells
grasses
Enzymes
enzymes
Orthophosphate Dikinase Pyruvate
Chloroplasts
Pyruvate Carboxylase
mesophyll
Oxygenases
cells
pyruvate carboxylase
malate dehydrogenase (oxaloacetate-decarboxylating) (NADP+)
chloroplasts
ribulose 1,5-diphosphate
oxygenases

All Science Journal Classification (ASJC) codes

  • Physiology
  • Plant Science
  • Cell Biology

Cite this

Photosynthetic Enzyme Accumulation during Leaf Development of Arundinella hirta, a C4 Grass Having Kranz Cells not Associated with Veins. / Wakayama, Masataka; Osamu, Ueno; Ohnishi, Jun Ichi.

In: Plant and Cell Physiology, Vol. 44, No. 12, 01.12.2003, p. 1330-1340.

Research output: Contribution to journalArticle

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