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Abiotic Limits for Germination of Sugarcane Seed in Relation to Environmental Spread.
Tropical Plant Biology ( IF 2 ) Pub Date : 2014-09-18 , DOI: 10.1007/s12042-014-9141-9
J S Pierre 1 , A L Rae 1 , G D Bonnett 1
Affiliation  

Sugarcane is a vegetatively propagated crop and hence the production of seed and its fate in the environment has not been studied. The recent development of genetically modified sugarcane, with the aim of commercial production, requires a research effort to understand sugarcane reproductive biology. This study contributes to this understanding by defining the abiotic limits for sugarcane seed germination. Using seed from multiple genetic crosses, germination was measured under different light regimes (light and dark), temperatures (from 18 °C to 42 °C) and water potentials (from 0 MPa to −1 MPa); cardinal temperatures and base water potential of germination were estimated based on the rates of germination. We found that sugarcane seed could germinate over a broad range of temperatures (from 11 °C to 42 °C) with optima ranging from 27 °C to 36 °C depending on source of seed. Water potentials below −0.5 MPa halved the proportion of seed that germinated. By comparing these limits to the environmental conditions in areas where sugarcane grows and has the potential to produce seed, water, but not temperature, will be the main limiting factor for germination. This new information can be taken into account when evaluating any risk of weediness during the assessment of GM sugarcane.

中文翻译:

与环境传播有关的甘蔗种子发芽的非生物限度。

甘蔗是无性繁殖的作物,因此尚未研究种子的生产及其在环境中的命运。为了商业化生产,转基因甘蔗的最新发展需要进行研究以了解甘蔗的生殖生物学。这项研究通过定义甘蔗种子发芽的非生物限度为这种理解做出了贡献。使用来自多个遗传杂交的种子,在不同的光照条件下(明暗),温度(从18°C到42°C)和水势(从0 MPa到-1 MPa)测量发芽率;根据发芽率估算基数温度和基础水发芽率。我们发现,甘蔗种子可以在很宽的温度范围内(从11°C到42°C)发芽,最佳温度范围从27°C到36°C,具体取决于种子的来源。低于-0.5 MPa的水势使发芽的种子比例减半。通过将这些限制与甘蔗生长并有潜力产生种子的地区的环境条件进行比较,水而不是温度将成为发芽的主要限制因素。在评估转基因甘蔗过程中评估任何杂草风险时,可以考虑这一新信息。将是发芽的主要限制因素。在评估转基因甘蔗过程中评估任何杂草风险时,可以考虑这一新信息。将是发芽的主要限制因素。在评估转基因甘蔗过程中评估任何杂草风险时,可以考虑这一新信息。
更新日期:2014-09-18
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