Ali Tehranifar; Yahya Selahvarzi; Ali Gazanchian; Hossein Arouiee
Abstract
Abstract
Many uses of landscape and important roll of ground covers aspect turfgrasses caused extensive of this plant in the cities. This study focuses on shoot responses and tolerance of native and commercial turf grasses under drought stress in a factorial experiment based on unbalanced completely ...
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Abstract
Many uses of landscape and important roll of ground covers aspect turfgrasses caused extensive of this plant in the cities. This study focuses on shoot responses and tolerance of native and commercial turf grasses under drought stress in a factorial experiment based on unbalanced completely random design on the year 2006. The specious that we used in this experiment included (i) commercial tall fescue (Festuca arundinacea) (ii) commercial perennial ryegrass (Lolium perenne) (iii) native tall fescue population (Festuca arundinacea). The drought stress levels included (i) 50%FC (ii) 25% FC (iii) recovery from drought stress and 3 groups of pots that was always in the field capacity condition. The results of this study showed that dry weight decreased 26.4% in 25% FC traits in compare with control traits under severe drought stress. Decreased in leaf wide, leaf total area, leaf total length and increase in leaf diameter caused decrease in evaportanspiration under drought stress in festuca genus. Parameter of quality change (TQ) and decrease in total chlorophyll content was minimum in native tall fescue and maximum in commercial ryegrass, from perfect irrigation to sever drought stress. Shoot dry weight, leaf width, total leaf area and total leaf length, visual quality and leaf total chlorophyll content increased 18.2%, 103.3%, 74.4%, 28.8%, 64.1%, 40.8% respectively, and mean leaf diameter decreased 53.2% in compare with sever drought stress condition after 14 days rewatering.
Key words: Recovery, Drought stress, Native fescue, Visual quality, Chlorophyll content
Yahya Selahvarzi; Ali Tehranifar; Ali Gazanchian; Hossein Arouiee
Abstract
Abstract
The lack of water is the most important problem in extensive landscape especially turfgrass in arid and semi arid regions. The root responses in native and commercial grasses under drought stress were investigated. This experiment was in a factorial experiment based on unbalanced completely ...
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Abstract
The lack of water is the most important problem in extensive landscape especially turfgrass in arid and semi arid regions. The root responses in native and commercial grasses under drought stress were investigated. This experiment was in a factorial experiment based on unbalanced completely random design on the year 2006. The specious that we used in this experiment included (i) commercial tall fescue (Festuca arundinacea) (ii) commercial perennial ryegrass (Lolium perenne) (iii) native tall fescue population (Festuca arundinacea). The drought stress levels included (i) 50%FC (ii) 25% FC (iii) recovery from drought stress and 3 groups of pots that was always in the field capacity condition. The replicates for control pots and drought/recovery treatments were 3 and 4 respectively. The results showed that root dry weigh of commercial and native tall fescue increased 40%, 11.9% respectively compared with control under severe drought stress. Whereas it decrease 33.6% in lolium perenne compared with control at same condition. Another root traits such as volume, total area and root total length in the native tall fescue increase 60.1%, 34.6%, 70.1% respectively compared with control under severe drought stress. This traits in plus 54% decrease in root diameter caused increased in rank of absorption and depletion of water from dry soil. That it caused better yield of this grass under drought stress. Ability of recovery in most morphological root characters increase in commercial grass after rewatering in compare with severe drought stress condition.
Keywords: Avoidance, Native population, Drought stress, Re-growth, Root
Mohammad Ahmadi; Gholamhossein Davarynejad; Majid Azizi; Naser Sedaghat; Ali Tehranifar
Abstract
Abstract
Sour cherry (Prunus cerasus L.) is an important Iranian-native fruit, considered highly perishable commodity which cannot be stored for any length of time. On this study, effect of three gas compositions (ambient, 5% O2+5% CO2+90% N2 and 10% O2+15% CO2+75% N2) and two storage temperatures (0 ...
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Abstract
Sour cherry (Prunus cerasus L.) is an important Iranian-native fruit, considered highly perishable commodity which cannot be stored for any length of time. On this study, effect of three gas compositions (ambient, 5% O2+5% CO2+90% N2 and 10% O2+15% CO2+75% N2) and two storage temperatures (0 and 5 °C) on two sour cherry cultivars namely Erdy jubileum and Erdy Botermo was studied in a CRD (completely randomized design) based on factorial design with three replications. Fruits were examined, 42 days after packaging, in case of such different qualitative factors as weight loss, tissue firmness, total soluble solids (TSS), titrable acidity (TA), pH, and colour. The results indicate a better preservation of qualitative properties such as weight loss, tissue firmness and colour in the modified atmosphere; in 5% O2+5% CO2+90% N2 the lowest weight loss and the highest firmness was defected. In Erdy jubileum at 5°C titrable acidity was the lowest and the favourable impact of the 5 °C temperature treatment on qualitative properties, compared to that of 0 °C.
Keywords: Sour cherry (Prunus cerasus L.), Packaging, MAP, Quality, shelf-life
