Abstract:

Salinity is one of the serious abiotic stresses adversely affecting the majority of arable lands worldwide, limiting the crop productivity of most of the economically important crops. Sweet basil (Osmium basilicum) plants were grown in a non-saline soil (EC = 0.64 dS m-1), in low saline soil (EC = 5 dS m-1), and in a high saline soil (EC = 10 dS m-1). There were differences between arbuscular mycorrhizal (Glomus deserticola) colonized plants (+AMF) and non-colonized plants (-AMF). Mycorrhiza mitigated the reduction of K, P and Ca uptake due to salinity. The balance between K/Na and between Ca/Na was improved in +AMF plants. Growth enhancement by mycorrhiza was independent from plant phosphorus content under high salinity levels. Different growth parameters, salt stress tolerance and accumulation of proline content were investigated, these results showed that the use of mycorrhizal inoculum (AMF) was able to enhance the productivity of sweet basil plants under salinity conditions. Mycorrhizal inoculation significantly increased chlorophyll content and water use efficiency under salinity stress. The sweet basil plants appeared to have high dependency on AMF which improved plant growth, photosynthetic efficiency, gas exchange and water use efficiency under salinity stress. In this study, there was evidence that colonization with AMF can alleviate the detrimental salinity stress influence on the growth and productivity of sweet basil plants.

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The impact of arbuscular mycorrhizal fungi in mitigating salt-induced adverse effects in sweet basil (<em>Ocimum basilicum</em> L.)

Khalid Elhindi

Ahmed El-Din

Abdallah Elgorban

^{Plant Production Department, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia}

^{Vegetable and Floriculture Department, Faculty of Agriculture, Mansoura University, Egypt}

^{Ornamental Plants and Landscape Gardening Research Department, Horticulture Research Institute, Agriculture Research Center, Giza, Egypt}

^{College of Science, Botany and Microbiology Department, King Saud University, Riyadh, Saudi Arabia}

Khalid M. Elhindi: as.ude.usk@idnihlek: moc.oohay@0102dilahkidnihle

^{Corresponding author at: Plant Production Department, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia; Vegetable and Floriculture Department, Faculty of Agriculture, Mansoura University, Egypt.Plant Production DepartmentCollege of Food and Agriculture SciencesKing Saud UniversityP.O. Box 2460Riyadh11451Saudi Arabia}as.ude.usk@idnihlek, moc.oohay@0102dilahkidnihle

Khalid M. Elhindi: as.ude.usk@idnihlek: moc.oohay@0102dilahkidnihle

Received 2015 Oct 17; Revised 2016 Jan 18; Accepted 2016 Feb 7.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

DM – dry matter, SH – shoot height, LN – leaf number, BN – branch number, LA – leaf area, IL – inflorescence length. Values in each column followed by the same letter(s) are not significantly different at P ⩽ 0.05 (Duncan’s multiple range tests), where NS − not significant, ^P ⩽ 0.05; ^P ⩽ 0.01; ^P ⩽ 0.001 (n = 4; means ± SE).

Values in each column followed by the same letter(s) are not significantly different at P ⩽ 0.05 (Duncan’s multiple range tests), where ^P ⩽ 0.001 (n = 4; means ± SE).

Values in each column followed by the same letter(s) are not significantly different at P ⩽ 0.05 (Duncan’s multiple range tests), where ^P ⩽ 0.001 (n = 4; mean ± SE).

Values in each column followed by the same letter(s) are not significantly different at P ⩽ 0.05 (Duncan’s multiple range tests), where ^P ⩽ 0.001 (n = 4; means ± SE).

DM – dry matter, LA – leaf area, BN − branch number, IL – inflorescence length, RC – relative chlorophyll. Values in each column followed by the same letter(s) are not significantly different at P ⩽ 0.05 (Duncan’s multiple range tests, n = 4; means ± SE).

SH – shoot height, LA – leaf area, BN – branch number, IL – inflorescence length. Values in each column followed by the same letter(s) are not significantly different at P ⩽ 0.05 (Duncan’s multiple range tests, n = 4; means ± SE).

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Peer review under responsibility of King Saud University.

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