عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Drought is one of the environmental stresses that have been recognized as the most important limiting factor for plant growth and production in most parts of the world. The aim of this study was to investigate the effects of drought on morpho-physiological indicators of Cucurbita maxima L. in two forms independently and with spraying Kinetin at two concentrations on growth parameters, photosynthetic pigments, and soluble sugars in leaves and roots. To achieve this aim, a pot experiment in a natural environment based on a factorial randomized complete block design was carried out in the form of 9 treatments with four replications. Three levels of drought stress in vegetative phase consisting of 2/3 and 1/3 of field capacity equivalent to mild and severe drought stress were applied with two concentrations of Kinetin including 2 and 4 mg per liter in the form of shoot spraying. The results showed that drought stress reduced the growth parameters, photosynthetic pigments, and starch and application of kinetin increased them significantly. On the other hand, drought stress increased soluble sugars while kinetin application decreased them. Overall results showed that the use of Kinetin in this study could significantly reduce the negative effects of drought on Cucurbita maxima L.
Abdelmoneim, T., Tarek, S., Moussa, A.A., Almaghrabi, O. Hassan, A., Alzahrani, S. and Abdelbagi, I. (2014). Increasing plant tolerance to drought stress by inoculation with arbuscular mycorrhizal fungi. Life Science Journal. 11(1): 1-17.
Aliabadi Farahani, H. and Valadabadi, S.A.R. (2010). Effect of arbuscular-mycorrhizal fungi on Coriander (Coriandrum sativum L.) under drought stress conditions. Iranian Journal of Water Soil Science, 24 (1): 69-80. (In Persian)
Anjum, Sh.A., Xie, X.Y., Wang, Ch., Saleem, M.F., Man, Ch. and Lei, W. (2011). Morphological, physiological and biochemical responses of plants to drought stress. African Journal of Agricultural Research. 6: 2026-2032.
Aslani, Z., Hassani, A., Rasouli Sadaghiani, M.H., Sefidkan, F. and Brin, M. (2011). The effects of two species of arbuscular mycorrhizal fungi (Glomus mosseae and Glomus intraradices) on the growth, chlorophyll content and phosphorus uptake of basil (Ocimum basilicum L.) under drought conditions. Iran Medicinal and Aromatic Plants Research. 53(3): 486-471. (In Persian)
Ceccarelli, N., Curadi, M., Martelloni, L., Sbrana, C., Picciarelli, P. and Giovannetti, M. (2010). Mycorrhizal colonization impacts on phenolic content and antioxidant properties of artichoke leaves and flower heads two years after field transplant. Plant and Soil. 335: 311-323.
Einhellig, F.A. (1986). Mechanism and modes of action of allelochemicals. In: Putnam, A.R. and Tang, C.S., (Eds.). The Science of Allelopathy. John Wiley and Sons, New York, pp: 75 - 99.
Esmaeilpour, B., Jalilvand, P. and Hadian, J. (2013). Effect of drought stress and mycorrhizal fungi on some morpho-physiological traits and yield of Savory (Satureja hortensis L.). Ecology Journal. 5 (2): 177-169.
Ghasem Jukar, N., Nadian, H. A., Khalil Moghaddam, B., Heidari M. and Qarineh, M.H. (2015). The effect of mycorrhizal symbiosis on the growth and proline content in Leek (Allium porrum L.) and two mass Persian leek (Allium ampeloprasum ssp. Persicum L.) under drought. Journal of Plant Production. 38 (1): 15-26.
Gholinezad, R., Sirousmehr, A.R. and Fakheri, B. (2014). Effect of drought stress and organic fertilizers on the activity of some antioxidant enzymes, photosynthetic pigments, proline and yield of Borage (Borago officinalis). Journal of Horticultural Science (Agricultural Science and Technology). 28 (3): 346-338.
Habibi, S., Mskrbashy, M. and Farzaneh, M. (2014). Effect of three species of mycorrhizal fungi (Glomus spp.) on physiological indices of wheat in saline conditions. Plant products (Scientific Journal of Agriculture). 37 (3): 53-36.
Harborne, J.B. (1980). Plant Phenolics. In: Bell EA and Charlwood BV. (Eds.). Secondary Plant Products. Springer Verlag, Berlin, pp: 329 - 402.
Jalilvand, P., Esmaeilpour, B., Hadian, J. and Rasoulzadeh, A. (2012). Effect of drought stress and mycorrhizal fungi on plant growth and secondary metabolites of Satureja. Seventh Congress of Iranian Horticultural Sciences. Technology University of Isfahan. Pp: 2.
Jami Ahmadi, M., Kafi, M. and Nasiri Mohalati, M. (2005). The investigation of seed germination characteristics of Kochia scoparia in response to different levels of salinity in a controlled environment. Journal of Agricultural Researches of Iran. (2): 159-151. (In Persian)
Khalvati, M.A., Mozafar, A. and Schmidhalter, U. (2005). Quantification of water uptakeby arbuscular mycorrhizal hyphae and its significance for leaf growth, water relations, and gas exchange of barley subjected to drought stress. Plant Biology Stuttgart. 7: 706-712.
Krause, G.H. and Weis, E. (1991). Chlorophyll fluorescence and photosynthesis: The basics. Annual Review of Plant Physiology and Plant Molecular Biology. 42: 313-349.
Koucheki, A., Nasiri Mohalati, M., Mondani, F. and Khorramdel, S. (2012). New aspect on Ecological physiological aspects of crop plants. 1st ed. Ferdowsi Mashhad University. Press, Ferdowsi Mashhad (Iran) pp. 613.
Ling-Lee, M., Chilvers, G.A. and Ash Ford, A.E. (1977). A histochemical study of phenolic materials in mycorrhizae and uninfected roots of Eucalyptus fastigata Deana and Maiden. NewPhytology, 78: 313-28.
Lynn, D.J. and Chang, M. (1990). Phenolic signals in cohabitation: Implication for Plant Development. Annual Review of Plant Physiology. 41: 497-526.
Mathur, N. and Vyas, A. (1995). Changes in isozyme patterns of peroxidase and polyphenol oxidase by VAM fungi in roots of Ziziphus species. Plant Physiology. 145 (4): 498 - 500.
McDonald, S., Prenzler, P.D., Autolovich, M. and Robards, K. (2001). Phenolic content and antioxidant activity of olive extracts. Food Chemistry. 73:73-84.
Mohsenzadeh, S., Malboobi, M.A., Razavi, K. and Farrahi-Aschtiani, S. (2006). Physiological and molecular responses of Aeluropus lagopoides (Poaceae) to water deficit. Environmental and ExperimentalBotany. 56: 314-322.
Rahmatzadeh, S. and Kazemitabar, S.K. (2013). Biochemical and antioxidant changes in regenerated periwinkle plantlets due to mycorrhizal colonization during acclimatization. International Journal of Agriculture and Crop Sciences. 5(14):1535-1540.
Reddy, A.R., Chaitanya, K.Y. and Vivekanandan, M. (2004). Drought induced responses of photosynthesis and antioxidant metabolism in higher plants. Journal of Environmental and Experimental Botany. 161: 1189-1202.
Shah Hossini, Z., Gholami, A. and Asghari, H.R. (2012). The effect of mycorrhizal symbiosis and the use of humic acid on water use efficiency and physiological indicators of corn growth in shortage irrigation condition. The Journal of Research Scientific of Dry Land. 2 (1): 57-39. (In Persian)
Smith, S.E., Facelli, E. and Pope, S. (2010). Plant performance in stressful environments: interpreting new and established knowledge of the roles of Arbuscular mycorrhizas. Plant and Soil. 326: 3-20.
Yaghobian, E., Pirdshti, H. A., Fizei Asl, V. and Mohamadi Goltapeh, A. (2012). The effect of Mycorrhizal symbiosis on the quantum efficiency of photosystem II in wheat under drought stress. Twelfth Congress of agronomy and plant breedig Sciences of Iran, Karaj, Islamic Azad University of Karaj.
Zare Merjerdi, M., Bagheri, A., Bahrami, R., Nabati, J. and Masoumi, A. (2012). Effect of drought stress on photosynthetic characteristics, phenolic compounds and radical scavenging activities in different chickpea (Cicer arietinum L.) genotypes in hydroponic conditions. Ejects. 3(12): 59-77.