Clumping and dispersal of chloroplasts in succulent plants

Ayumu Kondo, Jun Kaikawa, Toru Funaguma, Osamu Ueno

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Plants have evolved various photoprotective mechanisms to mitigate photodamage. Here we report the diurnal movement of chloroplasts in the leaves of succulent crassulacean acid metabolism (CAM) plants under combined light and water stress. In leaves of water-stressed plants, the chloroplasts became densely clumped in one or sometimes two areas in the cytoplasm under light and dispersed during darkness. The chloroplast clumping resulted in leaf optical changes, with a decrease in absorptance and an increase in transmittance. The plant stress hormone abscisic acid induced chloroplast clumping in the leaf cells under light. We suggest that the marked chloroplast movement in these CAM plants is a photoprotective strategy used by the plants subjected to severe water stress.

Original languageEnglish
Pages (from-to)500-506
Number of pages7
JournalPlanta
Volume219
Issue number3
DOIs
Publication statusPublished - Jul 2004

All Science Journal Classification (ASJC) codes

  • Genetics
  • Plant Science

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