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Abstract
Plant movements in response to directional solar radiation, known as “heliotropism” are frequently observed in nature. Although there is a considerable amount of literature on these movements in vegetative organs, knowledge about heliotropic responses in flowers and inflorescences is relatively limited. Here we comprehensively review studies on this topic, profile the diversity of responses encompassed under the term “heliotropism” and propose a conceptual framework for their classification. In addition, we discuss the mechanisms underlying different types of heliotropism in two species commonly used as model systems: Arabidopsis and sunflower. Finally, the ecological consequences of floral heliotropism are elaborated with an emphasis on the effects on plant reproductive success, and the potential agricultural implications of manipulating heliotropic responses are addressed as well. We conclude that inflorescence heliotropism appears conserved in many plant species that depend on pollinators, and consists of an auxin dependent response to solar radiation.
Keywords
Heliotropism, Phototropism, Flowers, Inflorescences, Arabidopsis, Sunflower, Phototropins, Auxin, Pollination, Fitness, SOLAR-TRACKING, ARABIDOPSIS-THALIANA, FLOWER HELIOTROPISM, RANUNCULUS-ADONEUS, TEMPERATURE STRESS, PAPAVER-RADICATUM, LEAF ORIENTATION, AUXIN TRANSPORT, SNOW BUTTERCUP, ALPINE PLANT

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Chicago
Serrano, Alejandro M, Maria Verónica Arana, Lucas Vanhaelewyn, Carlos L Ballaré, Dominique Van Der Straeten, and Filip Vandenbussche. 2018. “Following the Star : Inflorescence Heliotropism.” Environmental and Experimental Botany 147: 75–85.
APA
Serrano, A. M., Arana, M. V., Vanhaelewyn, L., Ballaré, C. L., Van Der Straeten, D., & Vandenbussche, F. (2018). Following the star : inflorescence heliotropism. ENVIRONMENTAL AND EXPERIMENTAL BOTANY, 147, 75–85.
Vancouver
1.
Serrano AM, Arana MV, Vanhaelewyn L, Ballaré CL, Van Der Straeten D, Vandenbussche F. Following the star : inflorescence heliotropism. ENVIRONMENTAL AND EXPERIMENTAL BOTANY. 2018;147:75–85.
MLA
Serrano, Alejandro M, Maria Verónica Arana, Lucas Vanhaelewyn, et al. “Following the Star : Inflorescence Heliotropism.” ENVIRONMENTAL AND EXPERIMENTAL BOTANY 147 (2018): 75–85. Print.
@article{8546643,
  abstract     = {Plant movements in response to directional solar radiation, known as “heliotropism” are frequently observed in nature. Although there is a considerable amount of literature on these movements in vegetative organs, knowledge about heliotropic responses in flowers and inflorescences is relatively limited. Here we comprehensively review studies on this topic, profile the diversity of responses encompassed under the term “heliotropism” and propose a conceptual framework for their classification. In addition, we discuss the mechanisms underlying different types of heliotropism in two species commonly used as model systems: Arabidopsis and sunflower. Finally, the ecological consequences of floral heliotropism are elaborated with an emphasis on the effects on plant reproductive success, and the potential agricultural implications of manipulating heliotropic responses are addressed as well. We conclude that inflorescence heliotropism appears conserved in many plant species that depend on pollinators, and consists of an auxin dependent response to solar radiation.},
  author       = {Serrano, Alejandro M and Arana, Maria Verónica and Vanhaelewyn, Lucas and Ballaré, Carlos L and Van Der Straeten, Dominique and Vandenbussche, Filip},
  issn         = {0098-8472},
  journal      = {ENVIRONMENTAL AND EXPERIMENTAL BOTANY},
  keywords     = {Heliotropism,Phototropism,Flowers,Inflorescences,Arabidopsis,Sunflower,Phototropins,Auxin,Pollination,Fitness,SOLAR-TRACKING,ARABIDOPSIS-THALIANA,FLOWER HELIOTROPISM,RANUNCULUS-ADONEUS,TEMPERATURE STRESS,PAPAVER-RADICATUM,LEAF ORIENTATION,AUXIN TRANSPORT,SNOW BUTTERCUP,ALPINE PLANT},
  language     = {eng},
  pages        = {75--85},
  title        = {Following the star : inflorescence heliotropism},
  url          = {http://dx.doi.org/10.1016/j.envexpbot.2017.11.007},
  volume       = {147},
  year         = {2018},
}

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