Rootstock influences on seasonal changes in leaf physiology and fruit quality of rio red grapefruit variety

Citrus is a conventionally produced fruit crop in extensive agricultural areas in Mediterraneantype agroecosystems. The use of rootstocks for citrus fruits is necessary for profitable production under some limiting factors, such as climactic factors, bad soil conditions, and diseases. In addition, the use of the citrus rootstocks provides a large number of choices to growers to increase fruit quality and yield, obtain early fruiting, uniform cropping and high-density planting, avoid juvenility, and control tree size. The aim of the present study was to evaluate the effects of several citrus rootstocks on the fruit yield, quality, physiological changes in leaves and leaf mineral composition of Rio Red grapefruit. Thus, seasonal changes in the leaf chlorophyll concentration, PSII efficiency (Fv / Fm), stomatal conductance (gS), leaf temperature, leaf mineral nutrient, fruit yield and fruit quality traits of the Rio Red grapefruit variety grafted onto six commonly used rootstocks (Carrizo citrange, citremon, sour orange, Swingle citrumelo, Troyer citrange and Volkameriana) in citriculture were evaluated. The physiological responses of fully expanded young leaves to rootstocks were significantly affected by seasonal changes. Two-way ANOVA indicated significant main effects of rootstock and season and their interaction (p ? 0.05) on the leaf Chl concentration. Leaf Chl concentrations were lowest in April for all rootstocks. The PSII efficiency slightly decreased in the leaves of Rio Red grafted onto Volkameriana in February. The rootstocks significantly affected seasonal changes in the leaf stomatal conductance. The highest gS was recorded in October in the leaves of a Rio Red variety grafted onto the Volkameriana rootstock. Significant rootstock effects on leaf Ca, Mg, Mn, Zn and Cu concentrations were observed in the Rio Red variety. The highest leaf Zn concentration (ppm) was recorded in plants on Volkameriana, whereas the lowest Zn concentrations were recorded in plants on Troyer citrange. There were no significant rootstock effects on leaf N, P, K and Fe concentrations. The rootstocks significantly affected the fruit yield of the Rio Red variety in the 2013 and 2014 harvest years. The highest fruit yield was observed in Rio Red grafted onto Carrizo citrange in 2013, whereas it was highest in plants on Troyer citrange in 2014. The fruit weight (g), fruit diameter (mm), total soluble solids (%), juice content (%) and juice color (hueo) of Rio Red grapefruit were significantly affected by the rootstocks. © 2018, ALÖKI Kft.CU-BAP-ZF2010BAP35Acknowledgements. This research was supported by a grant from the Scientific Coordinating Office of Cukurova University (project CU-BAP-ZF2010BAP35.)

Performance of ''Rio Red'' Grapefruit on Seven Rootstocks in the Eastern Mediterranean Region of Turkey

WOS: 000338847100018The effects of rootstocks such as 'sour orange' (Citrus aurantium L. var. 'Yerli'), 'Carrizo' and 'Troyer citranges' (Citrus sinensis Osb. x Poncirus trifoliata Raf), 'Smooth Flat Seville sour orange' (Citrus spp. hybrid of uncertain origin), 'Brazilian sour orange' (Citrus aurantiam L. var. 'Brasilian'), 'Volkameriana' (Citrus volkameriana Tan. and Pasq.) and 'Calamondin' (possibly Citrus reticulate var. austerexFortunella hybrid, Swingle) on plant growth, fruit yield, and quality of 'Rio Red' grapefruit were investigated from 2008 to 2012. Rootstocks were found to have significant effects on plant growth, fruit yield, and quality. 'Rio Red' grapefruit trees budded on 'Carrizo' and 'Troyer citranges' showed higher vegetative growth parameters (canopy height, diameter, and volume) than the trees on the other rootstocks. The trees on 'Volkameriana' and 'Carrizo citrange' produced higher percentage of cumulative yield of about 55.1 and 34.3%, respectively, than the trees on 'sour orange'. 'Rio Red' grapefruit budded on 'Carrizo citrange' had higher fruit quality such as thin rind, high juice content, and more color development than the other rootstocks. 'Carrizo citrange' was the most promising rootstock for 'Rio Red' grapefruit in Dortyol, Eastern Mediterranean region of Turkey

Performance of "rio red" grapefruit on seven rootstocks in the Eastern Mediterranean Region of Turkey

The effects of rootstocks such as 'sour orange' (Citrus aurantium L. var. 'Yerli'), 'Carrizo' and 'Troyer citranges' (Citrus sinensis Osb. x Poncirus trifoliata Raf), 'Smooth Flat Seville sour orange' (Citrus spp. hybrid of uncertain origin), 'Brazilian sour orange' (Citrus aurantiam L. var. 'Brasilian'), 'Volkameriana' (Citrus volkameriana Tan. and Pasq.) and 'Calamondin' (possibly Citrus reticulate var. austere×Fortunella hybrid, Swingle) on plant growth, fruit yield, and quality of 'Rio Red' grapefruit were investigated from 2008 to 2012. Rootstocks were found to have significant effects on plant growth, fruit yield, and quality. 'Rio Red' grapefruit trees budded on 'Carrizo' and 'Troyer citranges' showed higher vegetative growth parameters (canopy height, diameter, and volume) than the trees on the other rootstocks. The trees on 'Volkameriana' and 'Carrizo citrange' produced higher percentage of cumulative yield of about 55.1 and 34.3%, respectively, than the trees on 'sour orange'. 'Rio Red' grapefruit budded on 'Carrizo citrange' had higher fruit quality such as thin rind, high juice content, and more color development than the other rootstocks. 'Carrizo citrange' was the most promising rootstock for 'Rio Red' grapefruit in Dörtyol, Eastern Mediterranean region of Turkey

Performance of ''Rio Red'' Grapefruit on Seven Rootstocks in the Eastern Mediterranean Region of Turkey

The effects of rootstocks such as 'sour orange' (Citrus aurantium L. var. 'Yerli'), 'Carrizo' and 'Troyer citranges' (Citrus sinensis Osb. x Poncirus trifoliata Raf), 'Smooth Flat Seville sour orange' (Citrus spp. hybrid of uncertain origin), 'Brazilian sour orange' (Citrus aurantiam L. var. 'Brasilian'), 'Volkameriana' (Citrus volkameriana Tan. and Pasq.) and 'Calamondin' (possibly Citrus reticulate var. austerexFortunella hybrid, Swingle) on plant growth, fruit yield, and quality of 'Rio Red' grapefruit were investigated from 2008 to 2012. Rootstocks were found to have significant effects on plant growth, fruit yield, and quality. 'Rio Red' grapefruit trees budded on 'Carrizo' and 'Troyer citranges' showed higher vegetative growth parameters (canopy height, diameter, and volume) than the trees on the other rootstocks. The trees on 'Volkameriana' and 'Carrizo citrange' produced higher percentage of cumulative yield of about 55.1 and 34.3%, respectively, than the trees on 'sour orange'. 'Rio Red' grapefruit budded on 'Carrizo citrange' had higher fruit quality such as thin rind, high juice content, and more color development than the other rootstocks. 'Carrizo citrange' was the most promising rootstock for 'Rio Red' grapefruit in Dortyol, Eastern Mediterranean region of Turkey

Pomological characterisation of different kiwifruit (Actinidia deliciosa) cultivars in Adana (Turkey)

Kiwifruit production in Turkey has increased very rapidly in recent years due to the high nutritional content, especially of vitamin. The performance and pomological characteristics of seven kiwifruit (Actinidia deliciosa) cultivars ('Hayward', 'Bruno', 'Monty', 'Abbott', 'Elmwood', 'Fatma' and 'Tere') were investigated during 2002 to 2007 in the Eastern Mediterranean region, Adana (Turkey). The fruit yield was determined every year from 2002 to 2007, and fruit quality was evaluated between 2002 and 2005. The highest yield per vine was obtained from 'Hayward' and 'Bruno', whereas the lowest yield was from 'Fatma' and 'Monty'. 'Elmwood' had the largest fruit size followed by 'Hayward'. The smallest fruit size was obtained from 'Tere' followed by 'Abbott' and 'Monty'. Vitamin C contents of these cultivars ranged from 78.00 to 52.38 mg ascorbic acid /100 g f.w. Fruit of Elmwood and Monty contained the highest concentrations of ascorbic acid followed by Hayward. For this area, it appears that the 'Hayward' variety is the most productive, has the largest fruit and highest vitamin C content.© 2011 Academic Journals