Effects of mycorrhizal colonization on growth parameters of onion under different irrigation and soil conditions

The effects of three Arbuscular Mycorrhizal Fungi (AMF), Glomus versiforme, G. intraradices and G. etonicatum) and three irrigation intervals (7, 9 and 11 days) on growth of onion (Allium cepa L.) cv. Red Azar Shahr were studied under two soil conditions (sterilized and non-sterilized). The results...

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Bibliographic Details
Published in:Pakistan journal of biological sciences 2007-05, Vol.10 (9), p.1491-1495
Main Authors: Bolandnazar, Saheb Ali, Neyshabouri, Mohammad Reza, Aliasgharzad, Nasser, Chaparzadeh, Nader
Format: Article
Language:English
Subjects:
Allium cepa
Glomeromycota - metabolism
Glomeromycota - ultrastructure
Glomus versiforme
Mycorrhizae - metabolism
Onions - anatomy & histology
Onions - growth & development
Onions - microbiology
Plant Leaves - anatomy & histology
Soil
Soil Microbiology
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Summary:The effects of three Arbuscular Mycorrhizal Fungi (AMF), Glomus versiforme, G. intraradices and G. etonicatum) and three irrigation intervals (7, 9 and 11 days) on growth of onion (Allium cepa L.) cv. Red Azar Shahr were studied under two soil conditions (sterilized and non-sterilized). The results indicated that, AMF colonization improved plant height, Leaf Area Index (LAI), total biomass, bulb dry mass and diameter, Harvest Index (HI) and chlorophyll content (p < 0.001). Bulbing occurred 10-15 days earlier in mycorrhizal plants. Irrigation interval decreased biomass, LAI, Leaf Area Ratio (LAR), bulb diameter and dry mass and chlorophyll content (b and total) at 11 day irrigation interval. In term of interaction, G. versiforme at 9 day and non-mycorrhizal plants at 11 day produced the greatest and the lowest LAI (8.56 vs. 1.57), respectively. Mycorrhizal onions in contrary to non-mycorrhizal ones produced more LAI and biomass in sterilized soil and inoculation with G. etonicatum and the non-mycorrhizal onions in sterilized soil had the highest and the lowest biomass, respectively.
ISSN:1028-8880
DOI:10.3923/pjbs.2007.1491.1495