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Showing 4 results for Abdossi


Volume 22, Issue 2 (3-2020)
Abstract

Effects of salinity (0, 2, 6, and 8 dS m-1) on some photosynthetic parameters and morphological characteristics of 3 almond cultivars (‘Tuono’, ‘Shoukofeh’ and ‘Sahand’), with or without Salicylic Acid (SA) treatment (at 0, 1 and 2 mM), were studied in a factorial experiment using the completely randomized design with 3 replications, in a greenhouse experiment. Results revealed that while SA at 1 mM significantly improved morphological and photosynthetic properties of salinized plants, its relatively higher concentration (2 mM) impaired growth and photosynthetic attributes. Of the tested cultivars, Shokoufeh grafted on the GF677 rootstock showed higher salt tolerance than the others. This study provides convincing evidence with regard to the potential of SA in improving almond plant growth under salt stress; suitable concentrations of SA when added to saline situations helped the plants in osmotic adjustment for alleviating the harmful effects of salinity. Efficacy of SA may be tested under field conditions before recommending it as a practical tool to enhance almond plant performance in saline soils.
 

Volume 22, Issue 6 (11-2020)
Abstract

Digitoxin is a glycoside isolated from leaves of various species of Digitalis genus that are commonly called foxgloves. Digitoxin is used for chronic cardiac insufficiency, tachyarrhythmia form of atrial fibrillation, paroxysmal ciliary arrhythmia, and paroxysmal supraventricular tachycardia. 1-Deoxy-d-Xylulose 5-phosphate Reductoisomerase (DXR) is an important rate-limiting enzyme in 2-C-Methyl-d-Erythritol 4-Phosphate (MEP) pathway, and expression level of DXR plays a critical role in control of plant isoprenoid biosynthesis pathway. The effects of different elicitors including putrescine, spermine, and spermidine at concentrations of 50 and 100 mg L-1 and also Methyl Jasmonate (MJ) at 50, 100, and 200 μM concentrations were explored on transcript levels of DXR gene in cell suspension culture of foxglove (Digitalis purpurea). DXR transcription levels were assessed by the semi-quantitative RT-PCR. Results showed that elicitors had significant effects on the expression level of DXR and contents of cardenolide and digitoxin. The highest digitoxin (61.3 μg g-1 DW) and cardenolide (1.48% mg-1 DW) content was observed in 100 mg L-1 spermidine treatment. In all treatments, the expression of DXR gene was increased compared with the control sample. The highest transcription levels of DXR gene was observed in 50 μM MJ and 100 mg L-1 putrescine elicitors, which was nine folds higher than the control condition, and the lowest levels were observed for putrescine treatments at concentrations of 50 and 100 mg L-1, respectively.

Volume 25, Issue 2 (2-2023)
Abstract

The present study aimed at assessment of the beneficial role of fungal inoculation [Arbuscular Mycorrhizal Fungi (AMF) and Trichoderma harzianum] and Selenium (Se) treatments (0.0, 0.5, 1.0, 2.0 and 4.0 mg kg-1 soil) on quality of strawberry cv. Camarosa by an emphasis on physiochemical characteristics. Fungal inoculation and Se treatment improved the fruit fresh and dry weights and fruit length, which was related to their capacity to enhance photosynthetic pigments (chlorophylls and carotenoid). Leaves protein, N, and P content as well as fruit total phenolic content and anthocyanin concentration were significantly affected by AMF and T. harzianum inoculation. It was found that strawberry plants inoculated with T. harzianum under 1.0 mg kg-1 soil of Se treatment had better leaves and fruit physicochemical characteristics as compared with other treatments. Overall, inoculation of T. harzianum along with 1.0 mg kg-1 soil of Se treatment could be recommended as an environmentally sustainable approach for improvement of the quality of strawberry cv. Camarosa fruit.

Volume 26, Issue 5 (9-2024)
Abstract

The present study investigated the effects of five Iranian male palm pollen grains as pollen sources on the fruit quality of two cultivars, ‘Barhee’ and ‘Piyarom’ (offshoot-derived and tissue culture-derived). The biochemical and enzymatic properties of fruit dates at the Tamar stage (full maturity) enabled the evaluation of pollen source effects on fruit quality. The research location was Jahrom Research Station, Fars Province, Iran, from 2018 to 2019. The pollen sources were genotypes ‘7001’ (control), ‘7005’, ‘7013’, ‘7030’, and ‘B11’. Pollinated with 7013 pollen, Offshoot-erived (OFS) trees of the ‘Barhee’ cultivar had the highest fruit flesh pH (7.07). In contrast, the lowest pH value (5.84) occurred in fruits of Tissue Culture-Derived (TCD) trees of the ‘Piyarom’ pollinated with the 7030. In the OFS ‘Piyarom’ the pollen source 7001 caused the highest fruit TSS (68.83%). When pollinated with the B11, ‘Barhee’ had the lowest fruit TSS (44.90%). In TCD ‘Piyarom’ trees, the 7030 pollen caused the highest TSS (62.53%). By receiving pollen from B11, the ‘Barhee’ produced fruits with the lowest TSS (44.23%). Regardless of being OFS or TCD and of the pollen source, on average, ‘Barhee’ produced fruits with more moisture content than fruits of the ‘Piyarom’. In OFS ‘Piyarom’ trees, pollen from the 7030 caused the highest Fruit Dry Matter (FDM) (87.40%), whereas the ‘Barhee’ pollinated with the 7001 produced fruits with the lowest FDM (67.15%). In TCD ‘Piyarom’ palms, pollen from the 7030 caused the highest FDM (85.19%), compared to the ‘Barhee’ pollinated with the 7013, which showed the lowest FDM (67.87%). Pollen from the 7030 caused the highest total sugar content in the fruits of OFS and TCD ‘Piyarom’ trees. The fruits of OFS ‘Piyarom’ trees had more Fe and Polyphenol Oxidase (PPO) activity than TCD ‘Piyarom’ trees.


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