Mycorrhizal association between the desert truffle Terfezia boudieri and Helianthemum sessiliflorum alters plant physiology and fitness to arid conditions

Tidhar Turgeman, Jiftach Ben Asher, Nurit Bejerano, Varda Kagan-Zur, Yoram Kapulnik, Yaron Sitrit

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

The host plant Helianthemum sessiliflorum was inoculated with the mycorrhizal desert truffle Terfezia boudieri Chatin, and the subsequent effects of the ectomycorrhizal relationship on host physiology were determined. Diurnal measurements revealed that mycorrhizal (M) plants had higher rates of photosynthesis (35%), transpiration (18%), and night respiration (49%) than non-mycorrhizal (NM) plants. Consequently, M plants exhibited higher biomass accumulation, higher shoot-to-root ratios, and improved water use efficiency compared to NM plants. Total chlorophyll content was higher in M plants, and the ratio between chlorophyll a to chlorophyll b was altered in M plants. The increase in chlorophyll b content was significantly higher than the increase in chlorophyll a content (2.58- and 1.52-fold, respectively) compared to control. Calculation of the photosynthetic activation energy indicated lower energy requirements for CO2 assimilation in M plants than in NM plants (48.62 and 61.56 kJ mol -1, respectively). Continuous measurements of CO2 exchange and transpiration in M plants versus NM plants provided a complete picture of the daily physiological differences brought on by the ectomycorrhizal relationships. The enhanced competence of M plants to withstand the harsh environmental conditions of the desert is discussed in view of the mycorrhizal-derived alterations in host physiology.

Original languageEnglish
Pages (from-to)623-630
Number of pages8
JournalMycorrhiza
Volume21
Issue number7
DOIs
StatePublished - 1 Oct 2011

Keywords

  • Activation energy
  • Chlorophyll b
  • Gas exchange
  • Photosynthesis
  • Transpiration

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics
  • Plant Science

Fingerprint

Dive into the research topics of 'Mycorrhizal association between the desert truffle Terfezia boudieri and Helianthemum sessiliflorum alters plant physiology and fitness to arid conditions'. Together they form a unique fingerprint.

Cite this