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Evaluation drought resistance of two species of Bromus (Bromus kopetdaghenis, Bromus tometolus) using mycorrhizal symbiosis
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Mohamad reza Ardakani *   , Somayeh Karimkhani , Farzad Paknezhad , Parisa Nejatkhah |
| Karaj Branch, Islamic Azad University, |
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Abstract: (484 Views) |
| In order to study evaluation of resistance to dryness in two species of Bromos by using micorhyza symbiosis, a test has been conducted in split split plot in the form of block basis plan fully randomly by four iterations in two agricultural years of 1396_1397 and 1397-1398 in the south of Tehran province. The main court consisted of dryness tension in three levels: 1-control(without tension in field capacity limit)(s1), 2-average tension (60% field capacity )( s2), 3-intensive tension (40% field capacity )(s3)and minor court also consisted of using micorhyza fungus in three levels including:1-without micorhyza as 1- control (M1), 2-the specie of Glomus intraradices (M2) 3- specie of Glomus mosseae (M3), two species of Bromus plant considered as minor court in two levels including:1_ (B1)Bromus kopetdaghensis (B1) -and Bromus tometolus (B2).Results showed that dryness tension resulted in decrease of number of leaf . Productivity geometrical average rate (MP) and productivity arithmetical average (MP)in the average tension condition was higher than intensive tension. Using Micorhyza species (M2) resulted in significant increase of the number of leaf, grass qualityand productivity arithmetical average index. In the comparison of average (S×M), tension and application of micorhyza resulted in increasing root length and dry weight of entire plant.The most dry weight of entire plant in (S3M2)resulted to the rate of 6/8 grams and root length in (S3M3)gained 7/37 cm.Application of (M2) in the third level resulted in 1/21 %of dry weight of entire plant toward lack of application of micorhyza in this tension rate.Also tension resulted in decrease of grass quality and in every three levels of dry tension ,application of micorhyza resulted in significant increase of grass quality toward control and this increase in (M2)was more than (M3).In this test the greatest root length gained in (S3B2).In the comparison between interaction average (M×B),the greatest root length gained in (M3B2)condition.Based on the result of interaction average comparison,(S×M×B),the highest height of plant gained in the treatment (S1M2B2).The greatest GMP in both years in tometolus grass species gained along with the application of G.intraradices micorhyza species (M2B2Y1) and (M2B2Y2). Based on results of interaction (S×M×B×Y),the highest stand to dryness index gained (S3M2B2Y2) and (S3M2B2Y1).In general, the species Bromus tometolus and using of fungus species Glomus intraradices suggested for this region in dryness tension condition. |
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| Keywords: Water shortage stress, Droght resistance index, Kopetdaghensis and Plant quality. |
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Full-Text [PDF 1246 kb]
(479 Downloads)
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Type of Study: Research |
Subject:
Abiotic Stresses
Received: 2020/08/27 | Accepted: 2023/02/11 | Published: 2023/01/30
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