Enhancing deep sowing success: genetic diversity in mesocotyl and coleoptile length, and field establishment of oats (Avena sativa).

IF 2.7 4区生物学 Q2 PLANT SCIENCES

Functional Plant Biology Pub Date : 2025-05-01 DOI:10.1071/FP24321

Angelia Tanu, Allan Rattey, Andrew Fletcher, Sarah Rich, Alexandra Taylor, Erik Veneklaas

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引用次数: 0

Abstract

Early and deep sowing practices have revolutionised Australian winter cropping. Oats (Avena sativa ) are the only winter-cereal with a mesocotyl, potentially allowing them to successfully emerge from deep sowing. This study examined the genetic differences in mesocotyl and coleoptile length, the effect of temperature on these traits, and undertook a field validation of deep-sown oats compared to selected wheat (Triticum aestivum ) and barley (Hordeum vulgare ) genotypes. A controlled environment experiment on 195 oat genotypes revealed long combined mesocotyl and coleoptile lengths (112-219 mm) with significant genotypic variation. A further controlled environment study compared the mesocotyl and coleoptile lengths of 42 genotypes across four temperatures (15-30°C). This revealed that temperatures exceeding 20°C reduced coleoptile and mesocotyl length by 3.7mm and 1.1mm per °C. Five field experiments compared the emergence of 19 oat, four wheat, and two barley genotypes from deep (110mm) and shallow sowing (40mm). Oats had greater emergence at depth compared to wheat and barley genotypes. The results indicate that oats are highly suited to early and deep sowing conditions due to their long mesocotyl and combined mesocotyl and coleoptile length.

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提高深播成功：燕麦（Avena sativa）中胚轴和胚芽鞘长度的遗传多样性和田间建立。

早播和深播的做法彻底改变了澳大利亚的冬季种植。燕麦（Avena sativa）是唯一具有中胚轴的冬季谷物，这可能使它们能够成功地从深播中脱颖而出。本研究考察了深播燕麦中胚轴和胚芽鞘长度的遗传差异以及温度对这些性状的影响，并与小麦（Triticum aestivum）和大麦（Hordeum vulgare）基因型进行了田间验证。在对照环境试验中，195个基因型的燕麦中胚轴和胚芽鞘组合长度较长（112 ~ 219 mm），且基因型差异显著。进一步的受控环境研究比较了42个基因型在4种温度（15-30°C）下的中胚轴和胚芽鞘长度。结果表明，温度超过20°C时，胚芽和中胚轴长度分别减少3.7mm和1.1mm。5个田间试验比较了19种燕麦、4种小麦和2种大麦基因型在深播（110mm）和浅播（40mm）条件下的出苗率。与小麦和大麦基因型相比，燕麦在深度处的出苗率更高。结果表明，燕麦具有较长的中胚轴和中胚轴与胚轴的组合长度，非常适合早播和深播条件。

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来源期刊

Functional Plant Biology 生物-植物科学

CiteScore

5.50

自引率

3.30%

发文量

156

审稿时长

1 months

期刊介绍： Functional Plant Biology (formerly known as Australian Journal of Plant Physiology) publishes papers of a broad interest that advance our knowledge on mechanisms by which plants operate and interact with environment. Of specific interest are mechanisms and signal transduction pathways by which plants adapt to extreme environmental conditions such as high and low temperatures, drought, flooding, salinity, pathogens, and other major abiotic and biotic stress factors. FPB also encourages papers on emerging concepts and new tools in plant biology, and studies on the following functional areas encompassing work from the molecular through whole plant to community scale. FPB does not publish merely phenomenological observations or findings of merely applied significance. Functional Plant Biology is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science. Functional Plant Biology is published in affiliation with the Federation of European Societies of Plant Biology and in Australia, is associated with the Australian Society of Plant Scientists and the New Zealand Society of Plant Biologists.