How to survive on Mediterranean coastal cliffs: tolerance to seawater in early life-cycle stages in Brassica incana Ten. (Brassicaceae)

IF 3.6 3区 生物学 Q1 PLANT SCIENCES Plant Biology Pub Date : 2024-07-16 DOI:10.1111/plb.13693
L. Laccetti, G. Salbitani, M. R. B. Lumaga, R. Bossa, P. Cerasuolo, F. Loreto, M. Manna, S. Carfagna, G. Scopece
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如何在地中海沿岸悬崖上生存:芸苔属植物(Brassica incana Ten.(十字花科)。
地中海沿岸悬崖是植物生物多样性的宝库,其中的脆弱植物物种尤其面临极端非生物条件和气候变化造成的局部灭绝风险。因此,旨在了解悬崖植物物种对非生物胁迫的耐受性的研究对于预测它们的长期存在或突出内在威胁非常重要。我们采用了一种综合方法,包括对(a)种子、(b)幼苗子叶和(c)幼苗进行解剖学、生理学和表型分析,以评估悬崖植物甘蓝(Brassica incana)在其生命周期的早期阶段能否耐受不同浓度的海水(SW:25%、50%和100%)。当暴露于高达 50%的海水中时,种子可以发芽。种子在 100%的海水中不发芽,但用淡水冲洗后可恢复发芽。种子的发芽率也随着 SW 浓度的增加而降低。暴露于 SW 会降低子叶的气孔大小和气孔指数,并对光合作用的光化学反应造成长期严重损害。幼苗的光化学反应对 SW 也很敏感,但影响程度低于子叶。这可能涉及叶绿体尺寸的重塑和细胞新陈代谢的激活。然而,即使从 SW 暴露中恢复过来,光化学反应也会限制在 100% SW 条件下的光合作用。我们的数据表明,B. incana 对海水有很强的耐受性,并显示出明显的盐生适应迹象。虽然种子和幼苗能够承受海水,但幼苗阶段似乎更为敏感。
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来源期刊
Plant Biology
Plant Biology 生物-植物科学
CiteScore
8.20
自引率
2.60%
发文量
109
审稿时长
3 months
期刊介绍: Plant Biology is an international journal of broad scope bringing together the different subdisciplines, such as physiology, molecular biology, cell biology, development, genetics, systematics, ecology, evolution, ecophysiology, plant-microbe interactions, and mycology. Plant Biology publishes original problem-oriented full-length research papers, short research papers, and review articles. Discussion of hot topics and provocative opinion articles are published under the heading Acute Views. From a multidisciplinary perspective, Plant Biology will provide a platform for publication, information and debate, encompassing all areas which fall within the scope of plant science.
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