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- W2181738324 abstract "In this study, seed germination, seedling growth and seed reserve utilization of three wheat species including Triticum boeoticum (diploid), T. dicoccoides (tetraploid) and T. aestivum (hexaploid), were investigated at different drought levels (osmotic potentials of 0, -0.3, -0.5 and -0.7 MPa). The objectives of this study were to characterize the evolutional tendency and assess the genetic variable response of germination characteristics and seedling growth to different drought levels in wheat from diploid to hexaploid. The results indicated that the one-hundred-seed weight, germination percentage, mean germination time, root length and root/shoot ratio of diploid wheat were significantly lower than those of tetraploid and hexaploid wheat (p 0.05). With the evolution of wheat from diploid to hexaploid, the seed reserve depletion percentage (SRDP) of wheat remained a downward trend. However, opposite status (increased) showed in the seed reserve utilization efficiency (SRUE) of wheat. Moreover, the weight of utilized seed reserve and seedling dry weight of wheat exhibited diploid<hexaploid<tetraploid. Wheat with different chromosome ploidies had different responses to water stress during seed-seedling transformation. With the evolution of wheat, the resistance ability to drought gradually increased, which could be proved by some experimental results, such as less-affected germination percentage, healthier root length, higher root/shoot ratio and SRUE under decreasing osmotic pressure from -0.3 MPa to -0.7 MPa. However, in terms of adaptation to drought, diploid wheat water uptake rate, seed germination rate, SRDP and growth were more rapid." @default.
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- W2181738324 date "2012-01-01" @default.
- W2181738324 modified "2023-09-27" @default.
- W2181738324 title "Different responses of wheat with different chromosome ploidies to water stress during seed-seedling transformation" @default.
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