The photosynthetic response of tobacco plants overexpressing ice plant aquaporin McMIPB to a soil water deficit and high vapor pressure deficit

Miki Kawase, Yuko T. Hanba, Maki Katsuhara

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

We investigated the photosynthetic capacity and plant growth of tobacco plants overexpressing ice plant (Mesembryanthemum crystallinum L.) aquaporin McMIPB under (1) a well-watered growth condition, (2) a well-watered and temporal higher vapor pressure deficit (VPD) condition, and (3) a soil water deficit growth condition to investigate the effect of McMIPB on photosynthetic responses under moderate soil and atmospheric humidity and water deficit conditions. Transgenic plants showed a significantly higher photosynthesis rate (by 48 %), higher mesophyll conductance (by 52 %), and enhanced growth under the well-watered growth condition than those of control plants. Decreases in the photosynthesis rate and stomatal conductance from ambient to higher VPD were slightly higher in transgenic plants than those in control plants. When plants were grown under the soil water deficit condition, decreases in the photosynthesis rate and stomatal conductance were less significant in transgenic plants than those in control plants. McMIPB is likely to work as a CO2 transporter, as well as control the regulation of stomata to water deficits.

Original languageEnglish
Pages (from-to)517-527
Number of pages11
JournalJournal of Plant Research
Volume126
Issue number4
DOIs
Publication statusPublished - Jul 2013

Fingerprint

soil water deficit
aquaporins
vapor pressure
tobacco
ice
transgenic plants
photosynthesis
stomatal conductance
Mesembryanthemum crystallinum
stomata
mesophyll
transporters
humidity
water
plant growth
soil

Keywords

  • Atmospheric humidity
  • CO transporter
  • Mesophyll anatomy
  • Mesophyll conductance

ASJC Scopus subject areas

  • Plant Science

Cite this

The photosynthetic response of tobacco plants overexpressing ice plant aquaporin McMIPB to a soil water deficit and high vapor pressure deficit. / Kawase, Miki; Hanba, Yuko T.; Katsuhara, Maki.

In: Journal of Plant Research, Vol. 126, No. 4, 07.2013, p. 517-527.

Research output: Contribution to journalArticle

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