Not only light quality but also mechanical stimuli are involved in height convergence in crowded Chenopodium album stands

Hisae Nagashima, Kouki Hikosaka

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    In crowded stands, height is often similar among dominant plants, as plants adjust their height to that of their neighbours (height convergence). We investigated which of the factors, light quality, light quantity and mechanical stimuli, is primarily responsible for stem elongation and height convergence in crowded stands. We established stands of potted Chenopodium album plants. In one stand, target plants were surrounded by artificial plants that were painted black to ensure that the light quality was not modified by their neighbours. In a second stand, target plants were surrounded by real plants. In both stands, one-half of the target plants were anchored to stakes to prevent flexing by wind. The target plants were lifted or lowered by 10cm to test whether height convergence was affected by the different treatments. Stem length was affected by being surrounded by artificial plants, anchoring and pot elevation, indicating that light quality, light quantity and mechanical stimuli all influenced stem elongation. Height convergence did not occur in the stand with artificial plants or in anchored plants. We conclude that light quality and mechanical stimuli are important factors for the regulation of stem growth and height convergence in crowded stands.

    Original languageEnglish
    Pages (from-to)803-811
    Number of pages9
    JournalNew Phytologist
    Volume195
    Issue number4
    DOIs
    Publication statusPublished - 2012 Sep 1

    Keywords

    • Biomass partitioning
    • Flexing caused by wind
    • Height convergence
    • Light quality
    • Mechanical stimuli
    • Red to far-red (R/FR) ratio
    • Stem diameter growth
    • Stem elongation

    ASJC Scopus subject areas

    • Physiology
    • Plant Science

    Fingerprint Dive into the research topics of 'Not only light quality but also mechanical stimuli are involved in height convergence in crowded Chenopodium album stands'. Together they form a unique fingerprint.

  • Cite this