Paper Information

Journal:   IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE)   2006 , Volume 37 , Number 1; Page(s) 139 To 147.
 
Paper: 

EFFECTS OF NACL-INDUCED AND SALTS MIXTURE SALINITY ON LEAF PROLINE AND GROWTH OF TOMATO IN SYMBIOSIS WITH ARBUSCULAR MYCORRHIZAL FUNGI

 
 
Author(s):  BARIN M.*, ALI ASGHARZADEH N., SAMADI A.
 
* FACULTY OF AGRICULTURE, UNIVERSITY OF URMIA
 
Abstract: 

Mycorrhizal symbiosis can affect yield and plant growth parameters in saline conditions. In the present research the effects of NaCl-induced and salinity due to salt mixtures on leaf praline as well as on growth indices of tomato (Lycopersicon esculentum, var Spectrum882) in symbiosis with two species of mycorrhiza arbuscular fungi were studied. The experiment was carried out in a glasshouse as a randomized complete block design with two factors of fungi in three levels, Mo (without fungi), Mi (Glomus interaradices) and Mm(Glomus mosseae) and salinity in eight levels. Two kinds of salinity were employed including: four dS/m levels of salt mixture (S1-S4), S1=1.2, S2=4, S3=6.5 and S4=8, and four levels of NaCl (S5-S8), S5=1.2, S6=4, S7="6.5 and S5=8. The seedlings were inoculated separately with two fungi species. Control plants (with no inoculation) were planted in a sterilized nursery. After one month, the inoculated plants were transferred to pots containing four Kg of sterilized sand, and salinity treatments were initiated gradually. Total growth period was 165 days. The results showed a significant increase in shoot dry weight, leaf area, root colonization percent (RCP), fruit weight and leaf proline concentration in. mycorrhizal plants in comparison with non-mycorrhizal plants (p<0.05). Although there was not a significant difference observed between the two species of fungi but the fungi species Mm and Mi increased tomato yield by 10% and 16% respectively (p<0.05). The effects of salinity were significant for the measured variables (p<0.001). As for dry weight of shoot and root, plant height, RCP and fruit weight. There were not any significant differences observed between comparable levels of the two kinds of salinity. Proline concentration in leaf was significantly (p<0.05) higher in NaCl (at the third and fourth levels) than in salts mixture treatment.

 
Keyword(s): SALINITY, PROLINE, TOMATO, ARBUSCULAR MYCORRHIZA
 
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