Mycorrhizal colonisation improves fruit yield and water use efficiency in watermelon (Citrullus lanatus Thunb.) grown under well-watered and water-stressed conditions.

Book Title: NA
Year Published: 2003
Month Published: NA
Author: Kaya, C. ; Higgs, D. ; Kirnak, H. ; Tas, I.
Book Group Author: NA

The effect of arbuscular mycorrhizal (AM) colonization by Glomus clarum on fruit yield and water use efficiency (WUE) was evaluated in watermelon (Citrullus lanatus) cv. Crimson Sweet F1 under field conditions. Treatments were: (1) well-watered plants without mycorrhizas (WW-M), (2) well-watered plants with mycorrhizas (WW+M), (3) water-stressed plants without mycorrhizas (WS-M) and (4) water-stressed plants with mycorrhizas (WS+M). When soil water tension readings reached -20 and -50 kPa for well-watered (WW) and water-stressed (WS) treatments, respectively, irrigation was initiated to restore the top soil to near field capacity. Water stress reduced watermelon shoot and root dry matter, fruit yield, water use efficiency but not total soluble solids (TSS) in the fruit, compared with the non-stressed treatments. Mycorrhizal plants had significantly higher biomass and fruit yield compared to nonmycorrhizal plants, whether plants were water stressed or not. AM colonization increased WUE in both WW and WS plants. Macro- (N, P, K, Ca and Mg) and micro- (Zn, Fe and Mn) nutrient concentrations in the leaves were significantly reduced by water stress. Mycorrhizal colonization of WS plants restored leaf nutrient concentrations to levels in WW plants in most cases. This is the first report of the mitigation of the adverse effect of water stress on yield and quality of a fruit crop.

Pages: 287 - 292
Volume: 253
Number: 2
Journal: Plant and Soil
Journal ISO: NA
Organization: NA
Publisher: NA
ISSN: 0032-079X

biomass, calcium, chemical composition, crop yield, drymatter, endomycorrhizas, fruits, iron, leaves, magnesium, manganese,mineral content, mycorrhizal fungi, mycorrhizas, nitrogen, nitrogencontent, nutrient content, phosphorus, plant composition, plantnutrition, plant water relations, potassium, root inoculation, roots,shoots, vesicular arbuscular mycorrhizas, water stress, water useefficiency, watermelons, zinc, Turkey, Citrullus lanatus, Glomus clarum,Citrullus, Cucurbitaceae, Violales, dicotyledons, angiosperms,Spermatophyta, plants, eukaryotes, Glomus, Glomales, Zygomycotina,Eumycota, fungi, West Asia, Asia, Mediterranean Region, DevelopingCountries, OECD Countries, chemical constituents of plants, Glomaceae,Mn, Horticultural Crops (FF003) (New March 2000), Plant Composition(FF040), Plant Nutrition (FF061), Plant Water Relations (FF062), PlantProduction (FF100), Soil Biology (JJ100)

Source: EBSCO
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