Species-specific variation in the importance of the spectral quality gradient in canopies as a signal for photosynthetic resource partitioning

Annals of Botany
Thijs L Pons, Yvonne E M de Jong-VAN Berkel

Abstract

Plants adjust the distribution of photosynthetic capacity and chlorophyll to canopy density. The importance of the gradient in the red : far-red ratio (R : FR) relative to the irradiance gradient was studied for its perception with respect to this partitioning of photosynthetic resources. Whether the relative importance of these two signals varied between six species of different growth habit (Phaseolus vulgaris, Lysimachia vulgaris, Hedera helix, Ficus benjamina, Carex acutiformis and Brachypodium pinnatum) was investigated further. Single leaves of plants were shaded in daylight by a spectrally neutral filter or a leaf. In another experiment, leaves were treated with supplemental FR. In most cases, treatment effects were evaluated after 2 weeks. Nitrogen and photosynthetic capacity (Amax) per leaf area, parameters pertaining to between-leaf resource partitioning, were strongly reduced in neutral shade but not additionally by spectral leaf shade. Supplemental FR reduced these parameters also, except in Carex. Acceleration of induction of senescence was observed in spectral leaf shade in primary bean leaves. Amax per unit chlorophyll, a parameter pertaining to within-leaf resource partitioning, was reduced in neutral shade, but...Continue Reading

Citations

Sep 19, 2008·Plant Physiology·Jessica BerthelootBruno Andrieu
Oct 30, 2016·Frontiers in Plant Science·Alex WuGraeme L Hammer
Jul 31, 2007·Plant, Cell & Environment·Ulo Niinemets
Aug 27, 2005·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Gyung-Tae KimHirokazu Tsukaya
Sep 6, 2020·The Plant Journal : for Cell and Molecular Biology·Heta MattilaEsa Tyystjärvi
Nov 1, 2007·Plant Signaling & Behavior·Alex Boonman, Thijs L Pons
Dec 17, 2011·Plant, Cell & Environment·Bastiaan BrouwerPer Gardeström
Jan 4, 2012·Physiologia Plantarum·Ryoji WatariTadaki Hirose

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