Camelina [Camelina sativa (L.) Crantz] is an oilseed of interest as a feedstock for sustainable aviation fuels due to its low carbon intensity. Camelina is reported to have salinity tolerance and able to establish in marginal lands but there is no knowledge on how spring and winter biotypes tolerate exposure to different salts and salt concentrations. The objective of this study was to determine seed germination and vigor of spring camelina (C046) and winter camelina (Joelle) under salinity and sodicity. A set of 50 seeds and a subset of 15 seeds were germinated in Petri dishes saturated with of NaCl, CaCl₂, and Na₂SO₄ solutions at concentrations of 0, 40, 80, 120, and 160 mM L⁻¹, in an incubator set to a constant temperature of 20°C. The experimental design was a randomized complete block with three replicates. Germinated seeds were counted daily for 7 days. With the exception of seedling dry weight and hypocotyl length, the winter biotype of camelina produced significantly lower values for measured parameters than the spring biotype. Averaged across varieties and salt concentrations, Na₂SO₄ reduced germination, vigor, and seedling dry weight more than NaCl and CaCl₂. In addition, Na₂SO₄ almost completely inhibited radicle and hypocotyl growth at concentrations > 80 mM L⁻¹. This is of significance, because Na₂SO₄ is commonly present in sodic soils in the northern Great Plains and sodium is known to disrupt soil structure and reduce water infiltration, which can inhibit root growth. Results from future studies using an advanced and genotyped recombinant inbred line (RIL) population from a cross between Joelle and C046 will help to identify loci and candidate genes associated with salinity tolerance, and provide breeders and genetic engineers knowledge for improving salinity tolerance in camelina.

中文翻译：

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冬季和春季亚麻荠在发芽过程中对盐度的敏感性

Camelina [Camelina sativa （L.） Crantz] 由于其低碳强度，是一种作为可持续航空燃料原料的油籽。据报道，亚麻荠具有耐盐性，能够在边缘土地上建立，但不知道春季和冬季生物型如何耐受不同盐分和盐浓度的暴露。本研究的目的是确定春季亚麻荠 （C046） 和冬季亚麻荠 （Joelle） 在盐碱度和钠含量下的种子发芽和活力。一组 50 颗种子和一组 15 颗种子在用浓度为 0、40、80、120 和 160 mM ^L-1 的 NaCl、CaCl₂ 和 Na₂SO₄ 溶液饱和的培养皿中发芽，在设置为 20°C 恒温的培养箱中。 实验设计是一个随机完全区组，具有 3 个重复。每天计数发芽的种子，持续 7 天。除了幼苗干重和下胚轴长度外，亚麻荠冬季生物型的测量参数值明显低于春季生物型。不同品种和盐浓度的平均值显示，Na₂SO₄ 比 NaCl 和 CaCl₂ 更能降低发芽率、活力和幼苗干重。此外，Na₂SO₄ 在浓度 > 80 mM ^L-1 时几乎完全抑制胚根和下胚轴生长。这很重要，因为 Na₂SO₄ 通常存在于北部大平原的钠质土壤中，众所周知，钠会破坏土壤结构并减少水渗透，从而抑制根系生长。 使用 Joelle 和 C046 杂交的高级和基因型重组自交系 （RIL） 种群的未来研究结果将有助于识别与耐盐性相关的基因座和候选基因，并为育种者和遗传工程师提供提高山茶耐盐性的知识。