Munné-Bosch Sergi
Departament de Biologia Vegetal, Facultat de Biologia, Universitat de Barcelona, Avinguda Diagonal 645, Barcelona, Spain.
Trends Plant Sci. 2008 May;13(5):216-20. doi: 10.1016/j.tplants.2008.02.002. Epub 2008 Mar 6.
Although senescence remains less studied in perennials than in monocarpic plants, major advances in understanding senescence in perennials have been achieved recently. This success is due not only to the use of genetic tools in woody plants but also to a renaissance of research on how perennials can live for centuries or even millennia. The particularities of perennial life are considered here, with an emphasis on how these affect senescence at different levels of organization. I conclude that although cellular and leaf senescence do share common features in monocarpic and perennial plants, the indeterminacy of meristems found in perennials begs the question of whether senescence really occurs in these organisms at the whole-plant level.
尽管与单次结果植物相比，多年生植物中的衰老现象仍较少被研究，但近年来在理解多年生植物衰老方面已取得了重大进展。这一成功不仅归功于在木本植物中使用遗传工具，还归功于对多年生植物如何能存活数百年甚至数千年的研究再度兴起。本文探讨了多年生植物生活的特殊性，重点关注这些特殊性如何在不同组织水平上影响衰老。我得出的结论是，尽管在单次结果植物和多年生植物中，细胞和叶片衰老确实有共同特征，但多年生植物中分生组织的不确定性引发了一个问题，即衰老是否真的在这些生物体的全株水平上发生。
