S. Yusup, S. Sundberg, W. Ilghar, A. Mallik, B.-B. Fan, J.-Q. Zhang, J.-Y. Wang, Z.-J. Bu
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引用次数: 0
摘要
烟雾介导的苔藓孢子萌发是一种适应火的进化特征,可能控制火灾后植物的组成。在泥炭地苔藓中,胶囊大小是如何影响孢子萌发的,无论是单独的还是与烟雾结合的,目前尚不清楚。我们选择了3种泥炭地苔藓,Sphagnum fuscum, S. squarrosum和Polytrichum strictum,并测量了每个物种40个蒴果的体积,将它们分为大蒴果组和小蒴果组。然后,我们评估了每个胶囊组内的孢子直径,并检查了烟-水处理后胶囊大小如何影响孢子萌发。我们发现只有沙粒的蒴果与孢子大小呈正相关。孢子活力在所有物种的蒴果中是一致的。大蒴果孢子比小蒴果孢子萌发率高。然而,大荚果孢子的萌发速度比小荚果孢子的萌发速度慢,这表明萌发率和萌发速度之间存在折衷关系。烟水对大蒴果孢子的萌发速度有促进作用,但对小蒴果孢子的萌发速度无促进作用。烟熏水对沙米孢子大蒴果孢子的休眠释放率分别为100%和45%,显著高于小蒴果孢子(33%和4%)。在窄螺旋体中没有这种荚膜大小依赖的差异。研究表明,不同蒴果大小的Sphagnum孢子的萌发力和烟雾响应萌发一致性的变化表现为下注-对冲(扩散萌发时间)和最佳下注(最佳发芽时间)策略的双重表达,使Sphagnum能够在自然和人为干扰的泥炭地保持种群持久性。
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.