草本植物中的资本和收入培育者：贮藏器官的相对生物量分配与克隆性状、物候和环境梯度的关系

IF 8.3 1区生物学 Q1 PLANT SCIENCES

New Phytologist Pub Date : 2024-11-13 DOI:10.1111/nph.20260

Timothy Harris, Andrea Kučerová, Martin Bitomský, Alena Bartušková, Frederick Curtis Lubbe, Jitka Klimešová

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引用次数: 0

摘要

季节性气候条件下的多年生草本植物在光合作用无法满足需求时，会将碳投入地下储存器官（如根茎）以支持生长。另一种解释是，当植物受到养分/水分的限制时，贮存分配是无法用于生长的剩余碳。我们分析了对根状茎的相对投资，以了解它们与上述哪种解释一致，并询问它们是否与单个物种的地上部分生物量成比例关系，以及克隆生长特征、物候或环境条件是否解释了种群或物种间的投资。我们将不同物种的相对根状茎投资与克隆特征、环境梯度和物候相关联。物候在很大程度上解释了种间分配差异。多年生草本植物的贮藏器官并不构成碳盈余的沉积，但资本繁殖者（早花）比收入繁殖者（晚花）在生长季节获得的碳分配更多。植物的资本繁殖者和收入繁殖者的效益/成本值得进一步研究。

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Capital and income breeders among herbs: how relative biomass allocation into a storage organ relates to clonal traits, phenology and environmental gradients

Perennial herbs of seasonal climates invest carbon into belowground storage organs (e.g. rhizomes) to support growth when photosynthetic acquisition cannot cover demands. An alternative explanation interprets storage allocation as surplus carbon that is undeployable for growth when plants are limited by nutrients/water. We analysed relative investments to rhizomes to see to which of these explanations they align, and asked whether they scale with biomass of aboveground organs in individual species and whether clonal growth traits, phenology or environmental conditions explain investment among populations or species.
We measured biomass of rhizomes, aboveground stems and leaves in 20 temperate herbaceous perennial species, each at two localities, establishing allometric relationships for pairs of organs. We correlated relative rhizome investment with clonal traits, environmental gradients and phenology, across species.
For pairs of organs, biomass typically scales isometrically. Interspecific allocation differences are largely explained by phenology. Neither interspecific nor intraspecific differences were explained by clonal traits or environment.
Storage organs of perennial herbs do not comprise deposition of carbon surplus, but receive greater allocation in capital breeders (early-flowering), than among income breeders (late-flowering) relying on acquisition during growing season. Capital and income breeders in plants deserve further examination of benefits/costs.

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来源期刊

New Phytologist 生物-植物科学

自引率

5.30%

发文量

728

期刊介绍： New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.