scholarly journals Shade-avoidance responses in two common coastal redwood forest species, Sequoia sempervirens (Taxodiaceae) and Satureja douglasii (Lamiaceae), occurring in various light quality environments

1999 ◽  
Vol 86 (5) ◽  
pp. 640-645 ◽  
Author(s):  
Wendy A. Peer ◽  
Winslow R. Briggs ◽  
Jean H. Langenheim
Keyword(s):  
Light Quality ◽  
Sequoia Sempervirens ◽  
Shade Avoidance ◽  
Forest Species ◽  
Redwood Forest ◽  
Avoidance Responses

Changes in the responses to light quality during ontogeny in Chenopodium album

2003 ◽  
Vol 81 (2) ◽  
pp. 152-163 ◽  
Author(s):  
Humberto Fabio Causin ◽  
Renata D Wulff
Keyword(s):  
Plant Growth ◽  
Light Quality ◽  
Chenopodium Album ◽  
Intraspecific Variability ◽  
Reproductive Fitness ◽  
Stem Length ◽  
Shade Avoidance ◽  
Late Flowering ◽  
Total Leaf ◽  
Avoidance Responses

Morphological shade-avoidance responses have been hypothesized to be a form of adaptive plasticity to improve competition for light; however, little is known about their intraspecific variability and their effect on reproductive fitness. To compare plant responses either at a common age or at a common phenological stage, two experiments were conducted with early- and late-flowering Chenopodium album plants exposed to different red (660 nm) to far red (730 nm) ratios. In the first experiment, plant height and number of leaves were recorded at several times during the vegetative stage, and at the onset of flowering, each plant was harvested and other growth traits were measured. In the second experiment, three destructive harvests were performed across the whole plant cycle. Plant growth and development markedly differed between early- and late-flowering plants in all of the conditions tested. Light treatments significantly affected stem length, total leaf number, total leaf area, and relative allocation to leaf biomass. In all families, the response of stem elongation to light treatments decreased later in the development, while changes in the other plastic responses were mostly due to variations in plant growth. No significant treatment effect was found on relative biomass allocation to reproductive structures. However, individual seed mass significantly differed between certain groups, indicating that light quality can affect reproductive fitness through changes in traits other than fruit or seed set.Key words: Chenopodium album, fitness, intraspecific variability, phenotypic plasticity, red to far red ratio, shade-avoidance responses.

scholarly journals Multiple Pathways in the Control of the Shade Avoidance Response

Plants ◽  
2018 ◽  
Vol 7 (4) ◽  
pp. 102 ◽  
Author(s):  
Giovanna Sessa ◽  
Monica Carabelli ◽  
Marco Possenti ◽  
Giorgio Morelli ◽  
Ida Ruberti
Keyword(s):  
Avoidance Response ◽  
Light Quality ◽  
Developmental Stages ◽  
Relative Fitness ◽  
Shade Avoidance ◽  
Signaling Mechanisms ◽  
Similarities And Differences ◽  
Growth Development ◽  
Molecular Description ◽  
New Strategies

To detect the presence of neighboring vegetation, shade-avoiding plants have evolved the ability to perceive and integrate multiple signals. Among them, changes in light quality and quantity are central to elicit and regulate the shade avoidance response. Here, we describe recent progresses in the comprehension of the signaling mechanisms underlying the shade avoidance response, focusing on Arabidopsis, because most of our knowledge derives from studies conducted on this model plant. Shade avoidance is an adaptive response that results in phenotypes with a high relative fitness in individual plants growing within dense vegetation. However, it affects the growth, development, and yield of crops, and the design of new strategies aimed at attenuating shade avoidance at defined developmental stages and/or in specific organs in high-density crop plantings is a major challenge for the future. For this reason, in this review, we also report on recent advances in the molecular description of the shade avoidance response in crops, such as maize and tomato, and discuss their similarities and differences with Arabidopsis.

scholarly journals Subtle variation in shade avoidance responses may have profound consequences for plant competitiveness

2017 ◽  
Vol 121 (5) ◽  
pp. 863-873 ◽  
Author(s):  
Franca J Bongers ◽  
Ronald Pierik ◽  
Niels P R Anten ◽  
Jochem B Evers
Keyword(s):  
Shade Avoidance ◽  
Avoidance Responses

Phytochrome A inhibits shade avoidance responses under strong shade through repressing the brassinosteroid pathway in Arabidopsis

2020 ◽  
Vol 104 (6) ◽  
pp. 1520-1534
Author(s):  
Bin Song ◽  
Hongli Zhao ◽  
Kangmei Dong ◽  
Meiling Wang ◽  
Shujuan Wu ◽  
...  
Keyword(s):  
Shade Avoidance ◽  
Phytochrome A ◽  
Avoidance Responses

scholarly journals Shade avoidance responses become more aggressive in warm environments

2020 ◽  
Vol 43 (7) ◽  
pp. 1625-1636 ◽  
Author(s):  
Sofía Romero‐Montepaone ◽  
Sofía Poodts ◽  
Patrick Fischbach ◽  
Romina Sellaro ◽  
Matias D. Zurbriggen ◽  
...  
Keyword(s):  
Shade Avoidance ◽  
Avoidance Responses
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