The New Zealand Institute for Plant and Food Research Limited, Private Bag 11600, Palmerston North 4442, New Zealand.
The New Zealand Institute for Plant and Food Research Limited, Private Bag 92169, Auckland Mail Centre, Auckland 1142, New Zealand.
J Exp Bot. 2022 Jul 16;73(13):4396-4411. doi: 10.1093/jxb/erac085.
Life on land exposes plants to varied abiotic and biotic environmental stresses. These environmental drivers contributed to a large expansion of metabolic capabilities during land plant evolution and species diversification. In this review we summarize knowledge on how the specialized metabolite pathways of bryophytes may contribute to stress tolerance capabilities. Bryophytes are the non-tracheophyte land plant group (comprising the hornworts, liverworts, and mosses) and rapidly diversified following the colonization of land. Mosses and liverworts have as wide a distribution as flowering plants with regard to available environments, able to grow in polar regions through to hot desert landscapes. Yet in contrast to flowering plants, for which the biosynthetic pathways, transcriptional regulation, and compound function of stress tolerance-related metabolite pathways have been extensively characterized, it is only recently that similar data have become available for bryophytes. The bryophyte data are compared with those available for angiosperms, including examining how the differing plant forms of bryophytes and angiosperms may influence specialized metabolite diversity and function. The involvement of stress-induced specialized metabolites in senescence and nutrient response pathways is also discussed.
陆地生活使植物暴露在各种非生物和生物环境胁迫下。这些环境驱动因素促进了陆地植物进化和物种多样化过程中代谢能力的大规模扩展。在这篇综述中，我们总结了关于苔藓植物的特殊代谢途径如何有助于提高其耐受胁迫能力的知识。苔藓植物是非维管束陆地植物群（包括角苔、地钱和苔藓），在登陆后迅速多样化。苔藓植物和地钱与开花植物一样广泛分布于各种环境中，能够在极地地区到炎热的沙漠景观中生长。然而，与开花植物不同的是，对于后者，其与胁迫耐受相关的代谢途径的生物合成途径、转录调控和化合物功能已经得到了广泛的描述，而对于苔藓植物，类似的数据直到最近才出现。我们将苔藓植物的数据与被子植物的数据进行了比较，包括研究苔藓植物和被子植物不同的植物形式如何影响特殊代谢物的多样性和功能。还讨论了胁迫诱导的特殊代谢物在衰老和营养响应途径中的作用。
