Photosynthetica 2019, 57(2):409-419 | DOI: 10.32615/ps.2019.048
The role of inoculum identity for growth, photosynthesis, and chlorophyll fluorescence of zinnia plants by arbuscular mycorrhizal fungi under varying water regimes
- 1 Department of Horticultural Science, College of Agriculture, Vali-e-Asr University of Rafsanjan, Iran
- 2 Department of Plant Pathology, College of Agriculture, Vali-e-Asr University of Rafsanjan, Iran
- 3 Department of Horticultural Science, College of Agriculture, Shiraz University, Iran
This experiment aimed to determine effects of three arbuscular mycorrhizal fungi (AMF), i.e., Rhizophagus irregularis, Rhizophagus intraradices, and Funneliformis mosseae, either singly or their mix inoculation on dry mass, photosynthesis, chlorophyll (Chl) fluorescence, leaf pigment contents, and water-use efficiency (WUE) in Zinnia elegans (var. Magellan Red) plants under different water regimes (WR). The greenhouse experiment was performed under a complete randomized design at four different WR [100% of field capacity (FC) as control, 80, 60, and 40% FC]. Our results suggested that arbuscular mycorrhizal symbiosis protected zinnia plants against WR through improving gas-exchange capacity, higher Chl and carotenoid concentrations, Chl fluorescence, and WUE. Regardless of WR, comparison of colonization percentage demonstrated that the highest colonization was recorded for mixed AMF, while mixed inoculation was not so effective for the growth promotion as the corresponding single inoculation.
Additional key words: drought resistance; mycorrhizae; photoinhibition; water relation; water stress.
Received: November 20, 2017; Accepted: October 22, 2018; Prepublished online: February 20, 2019; Published: May 16, 2019 Show citation
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Supplementary files
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