Abstract
Large initial seed size frequently confers distinct advantages on cereal crops in terms of seedling vigor, hardiness, improved stand establishment, and higher productivity. This study was conducted to determine if these advantages inherent in the plants grown from large seeds persist when the crop is subjected to salinity stress. Two hard red spring wheat cultivars, ‘Yecora Rojo’ and ‘Anza’ were grown in greenhouse sand cultures from seed of two size classes that differed in weight by a factor of 2. The cultures were irrigated four times daily with complete nutrient solutions to which NaCl and CaCl2 (2:1 molar ratio) were added to achieve osmotic potentials of −0.05. −0.55, and −0.70 MPa with electrical conductivities of 1.8, 12.8, and 15.8 dS m-1, respectively. In response to both salinity and small initial seed size, the following plant characteristics decreased: leaf appearance rate, blade area, tillers per plant, spikelets per spike and seeds per spike. Plants grown from large seeds out-yielded those from small seeds by 8, 37, and 27% for Yecora Rojo and by 15, 30, and 23% for Anza at osmotic potentials of −0.05, −0.55 and −0.70 MPa, respectively. Compared to the corresponding nonsaline controls, the yield of Yecora Rojo grown at −0.55 MPa was 51% for the plants from large seed and 35% from the small seeds. For Anza salinized at −0.55 MPa, these values were 49 and 40%, respectively. Exploitation of the benefits derived from large initial seed size may be a cost-effective management strategy for improving wheat productivity in salt-affected areas.
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References
Austenson H M and Walton P D 1970 Relationships between initial seed weight and mature plant characters in spring wheat. Can. J. Plant Sci. 50, 53–58.
Bremner P M, Eckersall R N and Scott R K 1963 The relative importance of embryo size and endosperm size in causing the effects associated with seed size in wheat. J. Agric. Sci. 61, 139–145.
Carver M F F 1977 The influence of seed size on the performance of cereals in variety trials. J. Agric. Sci., Camb. 89, 247–249.
Francois L E, Maas E V, Donovan T J and Youngs V L 1986 Effect of salinity on grain yield and quality, vegetative growth, and germination of semi-dwarf and durum wheat. Agron. J. 78, 1053–1058.
Freyman S 1978 Influence of duration of growth, seed size, and seeding depth on cold hardiness of two hardy winter wheat cultivars. Can. J. Plant Sci. 58, 917–921.
Grieve C M, Lesch S M, Francois L E and Maas E V 1992 Analysis of main-stem yield components in salt-stressed wheat. Crop Sci. 32, 697–703.
Halloran G M and Pennell A L 1982 Grain size and seedling growth of wheat at different ploidy levels. Ann. Bot. 49 103–113.
Hampton J G 1981 The extent and significance of seed size variation in New Zealand wheats. N. Z. J. Exp. Agric. 9, 179–183.
Haun J R 1973 Visual quantification of wheat development. Agron. J. 65, 116–119.
Jha B N, Sinha S K and Singh J N 1985 Effect of seed size on yield in wheat (Triticum aestivum). Seed Res. 13, 24–27.
Kiesselbach T A 1924 Relation of seed size to the yield of small grain crops. J. Am. Soc. Agron. 16, 670–682.
Klepper B, Rickman R W and Peterson C M 1982 Quantitative characterization of vegetative development in small cereal grains. Agron. J. 74, 789–792.
Lafond G P and Baker R J 1986a Effects of genotype and seed size on speed of emergence and seedling vigor in nine spring wheat cultivars. Crop Sci. 26, 341–346.
Lafond G P and Baker R J 1986b Effects of temperature moisture stress, and seed size on germination of nine spring wheat cultivars. Crop Sci. 26, 563–567.
Maas E V and Grieve C M 1990 Spike and leaf development in salt-stressed wehat. Crop Sci. 30, 1309–1313.
Mian E V and Nafziger E D 1992 Seed size effects on emergence, head number, and grain yield of winter wheat. J. Prod. Agric. 5, 265–268.
Peterson C M, Klepper B and Rickman R W 1989 Seed reserves and seedling development in winter wheat. Agron. J. 81, 245–251.
Pinthus M J and Osher R 1966 The effect of seed size on plant growth and grain yield components in various wheat and barley varieties. Israel J. Agric. Res. 16, 53–58.
Puri Y P and Qualset C O 1978 Effect of seed size and seedling rate on yield and other characteristics of durum wheat. Phyton 36, 41–45.
Randhawa G S, Bains D S and Gill G S 1973 The effect of the size of seed on the growth and development of wheat. J. Res. Punjab Agric. Univ. 10, 291–295.
SAS Institute 1985 SAS User's Guide: Statistics Version 5. SAS Institute, Inc. Cary, NC. 956 p.
Spilde L A 1989 Influence of seed size and test weight on several agronomic traits of barley and hard red spring wheat. J. Prod. Agric. 2, 169–172.
Srivastava J P and Nigam S N 1973 Effect of seed size on yield and other agronomic characters in wheat (Triticum aestivum). Seed Res. 1, 52–57.
Wood D W, Longden P C and Scott R K 1977 Seed size variation: Its extent, source and significance in field crops. Seed Sci. Technol. 5, 337–352.
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Grieve, C.M., Francois, L.E. The importance of initial seed size in wheat plant response to salinity. Plant Soil 147, 197–205 (1992). https://doi.org/10.1007/BF00029071
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DOI: https://doi.org/10.1007/BF00029071