4627

4355

كارشناسي ارشد

علوم باغباني

اصفهان: دانشگاه صنعتي اصفهان ، دانشكده كشاورزي

1387

هفده ، 149 ، [II] ص: مصور ، جدول ، نمودار

ص. ع. به: فارسي وانگليسي

علي اكبر رامين

باني نسب ، آقا جاني

88/6/14

قبادي ، احسان زاده

1396/09/13

كتابنامه

مهندسي كشاورزي

ID4355

به فارسي وانگليسي: قابل رويت در نسخه ديجيتال

Effect of Salinity on Growth and Gas Exchange Parameters in Citrus Rootstocks Davood Khoshbakht davod khoshbakht@gmail com 14 March 2009 Department of Horticultural Science Isfahan University of Technology Isfahan 8415683111 IranDegree M Sc Language FarsiSupervisor Prof Ali A Ramin aa ramin@cc iut ac irAbstractSalt is one of the greatest factors that limit the growth of plants and production of crops This topic hasbeen of utmost importance since long ago Current reports show that this problem is increasing Citrusare plants which are sensitive to salt Since most species of citrus are reproduced with grafting thetolerance of the scion to salt is to a great extent dependent on the type of rootstock Except part ofcitrus orchards in the north other citrus are in areas which have the potentiality of getting salty becauseof the decrease of rainfall excessive use of under ground waters penetration of salty water to sweetwater high evaporation and bad management of irrigation Consequently the damages related to beingsalty increase every day Therefore according to the above mentioned limitations a greenhouse studywas arranged to assess the salt tolerance of nine citrus rootstocks namely Sour orange Citrusaurantium Bakraii Citrus reticulata Citrus limetta Cleopatra mandarin Citrus reshni Rangpurlime Citrus limonia Rough lemon Citrus jambhiri Macrophylla Citrus macrophylla Swinglecitrumelo Poncirus trifoliata Citrus paradisi Citrange Poncirus trifoliata Citrus sinensis andTrifoliate orange Poncirus trifoliata A factorial experiment through complete randomized design CRD with three replications and four levels of salt including 0 25 50and 75 mM NaCl withelectrical conductivity of 1 5 4 5 6 79 and 9 06 dS m2 were used The study was done in theDepartment of Horticulture College of Agriculture Isfahan University of Technology Isfahan Iran By increasing the levels of salt the number of leaves plant height leaf area the weight of wet and dryleaf stem and root number and length of root relative water content RWC chlorophyll content chlorophyll fluorescence yield Fv Fm net CO2 assimilation rate ACO2 stomata conductance gs transpiration E and water use efficiency WUE decreased Being salty also increased electrolyteleakage The result of comparison of the mean of growth parameters showed that there is a significantdifference between various cultivars of citrus Among of genotypes Sour orange Cleopatramandarin and Rang pur lime had the least and Trifoliate orange Citrange Swingle citrumelo showed the most decrease in growth indexes of shoots and roots The most relative water content RWC was in the Sour orange Cleopatra mandarin and Bakraii respectively The least and mostelectrolyte leakage was seen in Sour orange and Trifoliate orange respectively About thechlorophyll content chlorophyll a and b Cleopatra mandarin and Sour orange had the most and Trifoliate orange Citrange Swingle citrumelo had the least amount respectively The mostamount of production of proline was observed in Rangpur lime and Rough lemon However Citrange possessed the least amount of proline Related to gas exchange indexes Sour orange

علي اكبر رامين

باني نسب ، آقا جاني

قبادي ، احسان زاده