Yazar "Dasgan, H. Yildiz" seçeneğine göre listele

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    The Effectiveness of Grafting to Improve Salt Tolerance of Sensitive Melon When the Tolerant Melon is Use as Rootstock
    (Elsevier Science Bv, 2015) Dasgan, H. Yildiz; Balacheva, E.; Yetisir, H.; Yarsi, G.; Altuntas, O.; Akhoundnejad, Y.; Coban, A.
    Melon is one of the important species of the Cucurbitaceae family. However the salinity sensitivity of the melon is the significant limitation in melon production areas. Grafting can be an alternative solution for saline conditions however the rootstock affinity of melons with the other species of the Cucurbitaceae family, mainly different squashes, is still economically uncertain. Therefore may be the melon itself can be good rootstock for the melon scions. In this research, the melon rootstock for melon scion was studied for salinity tolerance. Melon cultivars that are sensitive and tolerant to salinity were reciprocally grafted and plants were grown under salt stress with control plants. Growing culture was vermiculite and plants were irrigated by the complete nutrient solution. Thirty days old melon plants, grafted and un-grafted were subjected to salinity stress during 25 days with 100mM NaCI. Some physiological parameters were investigated. Grafting on the tolerant melon increased the responses of the sensitive melon to salinity in comparison to the un-grafted one. The shoot fresh weight and leaf area both were increased by 27%, leaf water potential was increased by 65%. Leaf membrane injury was decreased by 13 and stomatal conductance was increased by 18%. Grafting technique and salt tolerant-melon-rootstock can be good solution for melon production under the saline conditions. (C) 2015 The Authors. Published by Elsevier B.V.
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    EFFECTS OF SALINITY STRESS ON CHLOROPHYLL AND CAROTENOID CONTENTS AND STOMATA SIZE OF GRAFTED AND UNGRAFTED GALIA C8 MELON CULTIVAR
    (Pakistan Botanical Soc, 2017) Yarsi, Garip; Sivaci, Aysel; Dasgan, H. Yildiz; Altuntas, Ozlem; Binzet, Riza; Akhoundnejad, Yelderem
    Salinity is known as the most important abiotic stress that decreases crop production and plant growth, and changes the anatomy and morphology of plants. In this study, the growth rate of grafted and ungrafted melon plants were studied under salinity stress. Maximus F-1, Shintoza F-90 F-1 and Nun 9075 F-1 (Cucurbita maxima x Cucurbita moschata) were used as a rootstock and Galia C8 melon cultivar was used as a scion. In this study, the stomata size and chlorophyll and carotenoid contents were investigated. According to the results, chlorophyll and carotenoid contents and stomata length and width of upper and lower surface of leaf were generally reduced under salinity stress.
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    EFFECTS OF SALINITY STRESS ON PLANT GROWTH AND MINERAL COMPOSITION OF GRAFTED AND UNGRAFTED GALIA C8 MELON CULTIVAR
    (Pakistan Botanical Soc, 2017) Yarsi, Garip; Altuntas, Ozlem; Sivaci, Aysel; Dasgan, H. Yildiz
    In this study, the growth performance and mineral composition of grafted and ungrafted melon plants were studied under salinity stress. In this study, the plant biomass such as total fresh and dry weight, roots and shoots length; and Ca2+, K+, Na+ and Cl- content in leaves, shoots and roots were investigated. Salt stress resulted in the decrease of total fresh and dry weight by 41.75% and 53.62% for ungrafted but this ratio was 17.17% and 19.25% for Maximus F-1/Galia, respectively. The amounts of Na+ and Cl- in leaves of ungrafted plants were very high levels than grafted plants. The effect of salinity was less pronounced in grafted melon plants compared with ungrafted melon plants.
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    Silicon-induced Salinity Tolerance Improves Photosynthesis, Leaf Water Status, Membrane Stability, and Growth in Pepper (Capsicum annuum L.)
    (Amer Soc Horticultural Science, 2018) Altuntas, Ozlem; Dasgan, H. Yildiz; Akhoundnejad, Yelderem
    Salt stress is a major problem worldwide because it decreases yields of many important agricultural crops. Silicon is the second-most abundant element in soil and has numerous beneficial effects on plants, particularly in alleviating stress-related impacts. Pepper is an important crop in the Mediterranean region, but pepper varieties differ in their salinity tolerances. The objective of this research was to test the ability of silicon to mitigate effects of salt stress in both salt-sensitive and salt-tolerant cultivars. Salt damage was evaluated by measuring biomass, photosynthetic-related variables, leaf water potential, and membrane damage. We found that the addition of silicon solute to a growth medium was highly effective in improving plant growth by enhancing photosynthesis, stomatal conductance (g(S)), leaf water status, and membrane stability, which in turn led to higher biomass production in salt-stressed pepper plants, especially in a salt-sensitive cultivar. From an agronomic viewpoint, application of Si may provide economically relevant productivity improvements for salt-sensitive pepper genotypes grown under moderate salinity conditions and for salt-tolerant genotype grown under higher-salinity conditions.