Journal of Food, Agriculture and Environment

Role of arbuscular mycorrhizae in development of salt-tolerance of Trifolium alexandrinum plants under salinity stress

Author(s):

M. H. Gharineh ^1*, H. Nadian ², G. Fathi ¹, A. Siadat ¹, B. Maadi ¹

Recieved Date: 2009-06-23, Accepted Date: 2009-10-03

Abstract:

A glasshouse experiment was conducted to study the effects of different sources (NaCl, Na₂SO₄, MgCl₂ and MgSO₄) and levels (2.2, 5 and 10 dS m^-1) of salinity on plant growth and P uptake by Trifolium alexandrinum L. colonized with Glomus intraradices. The experiment had a randomized complete block design with 4 sources of salts×3 levels of salinity×2 mycorrhiza (with and without G. intraradices) arranged in factorial combination with three replications. The results showed that shoot dry weight of both mycorrhizal and non-mycorrhizal plant decreased with increasing soil salinity, particularly when the soil was supplied with NaCl. However, shoot dry weight of mycorrhizal plant was greater than that of non-mycorrhizal plant at all soil salinity levels. A similar trend was observed for root dry weight of clover plant. The detrimental effect of soil salinity on mycorrhizal root growth was more pronounced than that on mycorrhizal shoot growth. The detrimental effects of NaCl on plant growth were much higher than those of MgCl₂, Na₂SO₄ and MgSO₄ as their concentration was increased. Results of this study, with respect to the specific effects of ions, show that clover plants, as a sensitive plant to soil salinity, were more considerably affected by sodium and chloride than by magnesium and sulphate. Increasing soil salinity decreased the percentage of root colonization. This led to a decline in P uptake. Decline in P uptake can be attributed to the reduction in root colonization due to the increase in soil salinity. In fact, the decline in root colonization with increasing soil salinity leads to a decline in surface area of interface for nutrients transfer to the host plant.

Keywords:

Arbuscular mycorrhiza, salinity, Trifolium alexandrinum, P uptake

---

Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 3&4
Category: Agriculture
Pages: 432-437

---

Full text for Subscribers

---

Information:

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

---

Purchase this Article:   20 Purchase PDF Order Reprints for 15

---

Share this article :