JOURNAL ARTICLE

Bulb growth potential is independent of leaf longevity for the spring ephemeral Erythronium americanum Ker-Gawl.

  • Published In: Journal of Experimental Botany, 2023, v. 74, n. 1. P. 489 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Bertrand, Hugo; Lapointe, Line 3 of 3

Abstract

This article investigates how modulating leaf lifespan affects the growth of the spring ephemeral Erythronium americanum under warm temperature conditions. Using Promalin® (a mixture of cytokinins and gibberellins) to prolong leaf life and silver thiosulfate (STS) to shorten it, the study found that reducing leaf lifespan with STS decreased total carbon assimilation and final bulb mass, while extending leaf lifespan with Promalin® increased carbon assimilation but did not enhance bulb growth. The results suggest that under warm conditions, bulb growth is limited not by leaf longevity or carbon supply but by the sink capacity of the bulb to utilize assimilated carbon. Consequently, climate warming and earlier canopy closure may reduce the size and reproductive success of spring geophytes like E. americanum despite potential increases in photosynthesis.

Additional Information

  • Source:Journal of Experimental Botany. 2023/01, Vol. 74, Issue 1, p489
  • Document Type:Article
  • Subject Area:Anatomy and Physiology
  • Publication Date:2023
  • ISSN:0022-0957
  • DOI:10.1093/jxb/erac432
  • Accession Number:160965640
  • Copyright Statement:Copyright of Journal of Experimental Botany is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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