Abstract
The cultivated strawberry Fragaria × ananassa Duch. is the natural hybrid of F. chiloensis (L.) Mill. and F. virginiana Mill. The progenitor species have high genetic diversity compared with the cultivated genotypes; therefore, the use of wild relative in F. chiloensis breeding could provide a good for broadening the available genetic variations of cultivated species. In present study, 13 genotypes selected from strawberry super core collection were tested under Fe (-) and Fe (+) conditions for their response against Fe deficiency conditions in a growth medium (GM) (soil + sand + perlite), potentially able to simulate the actual GM in nature. SPAD-meter readings indicating chlorophyll levels of the leaf, shoot dry matter yield, Fe-efficiency rate, shoot total and active Fe concentrations were determined to evaluate the resistance levels of strawberry genotypes against Fe deficiency. Results of this study indicated that different response for strawberry subspecies and genotypes of the same subspecies grown in GM against Fe deficiency. Symptom for Fe deficiency of genotypes varied between 1-5, SPAD-meter readings 3, shoot dry matter yields and shoot Fe concentrations varied between 6.5-38, 1.02-6.06 g plant-1 and 41.8-233.1 mg kg-1 respectively. Iron-efficiencies of genotypes were found between 58–98%. Strawberry subspecies, F. virginiana spp. glauca, F. chiloensis ssp. chiloensis and F. chiloensis ssp. pacifica showed Fe-efficiency values of 93.8, 79.5 and 79.1% respectively. We concluded that shoot growth performance, Fe intake from GM, transfer of Fe from roots to shoots, shoot Fe-use efficiency, Fe deficiency symptom levels and SPAD-meter readings indicating chlorophyll levels were significant parameters to evaluate the resistance of strawberry genotypes against Fe deficiency. The most Fe-efficient genotypes belonging to F. virginiana spp. glauca could be used in breeding programs aiming at developing new strawberry genotypes suitable for growing under Fe deficient conditions.
Highlights
Iron (Fe) deficiency is a common nutritional problem in human, plants and soils. El-Jendoubi (2012) reported that the incidence of Fe chlorosis is widespread in the Mediterranean basin (Abadía et al 2004, Sanz et al 1992) it prevailed in Northern Greece (Tagliavini et al 2000), Turkey (Tekin et al 1998)
Severity of Iron Deficiency Symptoms and Chlorophyll Levels (SPAD values) of Leaves Sensitivity of 13 strawberry genotypes against Fe deficiency were tested with Fe (-) and Fe (+) treatments under greenhouse conditions
Iron deficiency symptoms among strawberry genotypes were observed as a homogeneous chlorosis over young leaves in earlier stage and necrotic patches in the stage (Fig. 1)
Summary
Iron (Fe) deficiency is a common nutritional problem in human, plants and soils. El-Jendoubi (2012) reported that the incidence of Fe chlorosis is widespread in the Mediterranean basin (Abadía et al 2004, Sanz et al 1992) it prevailed in Northern Greece (Tagliavini et al 2000), Turkey (Tekin et al 1998). Iron deficiency affects almost 1.6 million people worldwide and has significant impacts especially on pre-school children and pregnant women (McLeon et al, 2009; Cakmak et al, 2010; Karaköy et al 2012) It is is quite common problem both in Turkish soils (Eyupoglu et al, 1998; Cakmak et al, 1999) and people (Cavdar et al, 1983). Iron and other micro-nutrient fertilizations to the soil and leaves are the primary measure to prevent Fe deficiency in plants. Such types of activities are expensive, environmentally unfriendly and temporary solutions for Fe deficiency. Organic-based (chelated) fertilizers may provide an alternative source for soil fertilization but they are expensive, lose their efficiencies in soils rapidly and increase Cu and Ni intakes (Palmer and Guerinot, 2009; Pestana et al, 2011)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
