Applications of a Commercial Extract of the Brown Seaweed Ascophyllum nodosum Increases Drought Tolerance in Container-grown ‘Hamlin’ Sweet Orange Nursery Trees
By T. Spann, Holly A. Little. 2011
151 citations recorded by the source corpus.
Hamlin' sweet orange trees on 'Carrizo' citrange and 'Swingle' citrumelo root- stocks were treated weekly with a commercial extract of the brown seaweed Ascophyllum nodosum at 5 and 10 mLL -1 as either a soil drench or foliar spray. Half of the trees in each treatment were subjected to drought stress (irrigated at 50% of evapotranspiration (ET)), whereas the other half remained fully irrigated (100% ET). Drought stress re- duced shoot growth and leaf photosynthesis but increased root and total plant growth relative to the amount of water applied, thus increasing whole plant water use efficiency. Trees treated with seaweed extract and drought-stressed had significantly more total growth than untreated drought-stressed trees for both rootstocks. The maintenance of growth by the seaweed extract under drought stress conditions was unrelated to pho- tosynthesis. However, the seaweed extract treatment did have a significant effect on plant water relations. Soil drench-treated trees had more growth and higher stem water po- tential than foliar-treated or control trees after 8 weeks of drought stress. These results indicate that seaweed extract may be a useful tool for improving drought stress tolerance of container-grown citrus trees.
Subfields: Nature and Landscape Conservation, Plant Science
View Paper: https://www.semanticscholar.org/paper/f42557cd7e5ad65f4b6119f38288f9a5f93307b5
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In Nature and Landscape Conservation
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Citations in the corpus
- Plant Biostimulants: Importance of the Quality and Yield of Horticultural Crops and the Improvement of Plant Tolerance to Abiotic Stress—A Review (2019, background): “The extracts from Ascophyllum nodosum are listed as the most frequently used [25,26].”
- A concise review of the brown macroalga Ascophyllum nodosum (Linnaeus) Le Jolis (2020, background): “…genes Nair et al. (2012) Stimplex® (Acadian Seaplants Ltd.) Orange tree Improved drought stress tolerance and maintained shoot growth under drought conditions Spann and Little (2011) Acadian® (Acadian Seaplants Ltd.) Spinach Enhanced phenolic antioxidant content of spinach Fan et al.…”
- Recent methods of drought stress tolerance in plants (2017, background): “Spann and Little (2011) reported that trees treated with seaweed extract experiencing drought-stress had significantly more total growth than untreated drought-stressed trees.”