Red/far-red light mediated stem elongation and anthocyanin accumulation in <i>Stellaria longipes</i>: differential response of alpine and prairie ecotypes

Alokam, Suneetha; Chinnappa, C. C.; Reid, David M.

doi:10.1139/b01-137

Cited by 56 publications

(41 citation statements)

References 48 publications

(48 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We first subjected the plants to low R/FR conditions. This is an early neighbor detection signal, and our results confirmed previous studies of contrasting responses for the two ecotypes (Alokam et al, 2002). The alpine plants were not responsive to low R/FR and grew at rates similar to the plants grown under control light conditions (Figs.…”

Section: Shade Signals Induced Different Growth Responses In the Alpisupporting

confidence: 91%

“…Consequently, its tall phenotype ensures a better chance of survival among the competing neighbors (Macdonald et al, 1988). Previous studies have shown that while the alpine ecotype is nonresponsive to low R/FR, an early shade signal, the prairie ecotype exhibits a typical shade avoidance response under similar conditions (Alokam et al, 2002). Differences within the same species in response to the same cue reflect the specialization of each ecotype to its specific habitat.…”

mentioning

confidence: 99%

See 1 more Smart Citation

The Regulation of Cell Wall Extensibility during Shade Avoidance: A Study Using Two Contrasting Ecotypes of Stellaria longipes

Sasidharan¹,

Chinnappa²,

Voesenek³

et al. 2008

Plant Physiol.

View full text Add to dashboard Cite

Shade avoidance in plants involves rapid shoot elongation to grow toward the light. Cell wall-modifying mechanisms are vital regulatory points for control of these elongation responses. Two protein families involved in cell wall modification are expansins and xyloglucan endotransglucosylase/hydrolases. We used an alpine and a prairie ecotype of Stellaria longipes differing in their response to shade to study the regulation of cell wall extensibility in response to low red to far-red ratio (R/FR), an early neighbor detection signal, and dense canopy shade (green shade: low R/FR, blue, and total light intensity). Alpine plants were nonresponsive to low R/FR, while prairie plants elongated rapidly. These responses reflect adaptation to the dense vegetation of the prairie habitat, unlike the alpine plants, which almost never encounter shade. Under green shade, both ecotypes rapidly elongate, showing that alpine plants can react only to a deep shade treatment. Xyloglucan endotransglucosylase/hydrolase activity was strongly regulated by green shade and low blue light conditions but not by low R/FR. Expansin activity, expressed as acid-induced extension, correlated with growth responses to all light changes. Expansin genes cloned from the internodes of the two ecotypes showed differential regulation in response to the light manipulations. This regulation was ecotype and light signal specific and correlated with the growth responses. Our results imply that elongation responses to shade require the regulation of cell wall extensibility via the control of expansin gene expression. Ecotypic differences demonstrate how responses to environmental stimuli are differently regulated to survive a particular habitat.

show abstract

Section: Shade Signals Induced Different Growth Responses In the Alpisupporting

confidence: 91%

mentioning

confidence: 99%

The Regulation of Cell Wall Extensibility during Shade Avoidance: A Study Using Two Contrasting Ecotypes of Stellaria longipes

Sasidharan¹,

Chinnappa²,

Voesenek³

et al. 2008

Plant Physiol.

View full text Add to dashboard Cite

show abstract

“…Light is one of the main determinants of anthocyanin production, and anthocyanin biosynthesis is strongly dependent on light intensity or light quality (Giusti and Wrolstad, 2005;Keppler and Humpf, 2005). In particular, when the different ecotypes were kept at different R/FR ratios, the anthocyanin level was significantly increased under higher R/FR ratios, and the pigment levels were almost the same under low R/FR ratios (Alokam et al, 2002). In our study, anthocyanin content was significantly increased in 24 ～33% with supplemental red and mixed red light treatments.…”

Section: Discussionmentioning

confidence: 99%

Effects of LED Light Illumination on Germination, Growth and Anthocyanin Content of Dandelion (Taraxacum officinale)

Ryu¹,

Seo²,

Choi³

et al. 2012

Korean Journal of Plant Resources

View full text Add to dashboard Cite

-Dandelion has been widely utilized for medicinal and edible purposes. This research was conducted to evaluate the effect of supplemental LED (light-emitting diode) light on germination, growth characteristics and anthocyanin content of dandelion (Taraxacum officinale) seedling using LED blue (460 nm), red (660 nm, R), blue + red (B:R=6:4) and fluorescent lamp light treatment. By LED illumination to T. officinale seed germination speed was delayed, and germination rate was the highest in the fluorescent light. The growth characteristics (plant height, number of leaves, root length and fresh weight) were greatly influenced by supplemental LED light compared with control treatment, and the growth promotion was the most effective in the red LED illumination. After 60 days of red and mixed LED light treatments, anthocyanin content of dandelion plants was significantly changed. The anthocyanin content was increased by 12~19 mg/100 g under the red LED and the mixed light conditions compared with the control and the blue LED. Results indicate that illumination with red and mix LEDs, compared with other light treatments, is beneficial for promotion of growth and anthocyanin content in dandelion.

show abstract

“…A prairie ecotype is naturally subjected to crowding in its native dense grasslands, whereas a dwarfed alpine ecotype grows in alpine regions of the Rocky Mountains with very little vegetation in which above-ground competition is almost absent. It was shown 17,105 that there is a clear variation in response to different light signals, between the two ecotypes (Fig. 3).…”

Section: Adaptive Value Of the Sas In An Ecological Contextmentioning

confidence: 93%

Physiological regulation and functional significance of shade avoidance responses to neighbors

Keuskamp

Sasidharan

Pierik

2010

Plant Signaling & Behavior

View full text Add to dashboard Cite

Besides being a source of energy, light is also a source of information that plants can respond to. Most plants are able to react to the direction, intensity, composition and duration of light. These light components regulate such features as seed germination, photomorphogenesis, flowering time and the SAS. [10][11][12] The SAS encompasses various phenotypic traits (Fig. 1), including elongation of internodes, petioles and hypocotyls, apical dominance, early flowering and upward leaf movement (hyponasty).

show abstract

Red/far-red light mediated stem elongation and anthocyanin accumulation in Stellaria longipes: differential response of alpine and prairie ecotypes

Cited by 56 publications

References 48 publications

The Regulation of Cell Wall Extensibility during Shade Avoidance: A Study Using Two Contrasting Ecotypes of Stellaria longipes

The Regulation of Cell Wall Extensibility during Shade Avoidance: A Study Using Two Contrasting Ecotypes of Stellaria longipes

Effects of LED Light Illumination on Germination, Growth and Anthocyanin Content of Dandelion (Taraxacum officinale)

Physiological regulation and functional significance of shade avoidance responses to neighbors

Contact Info

Product

Resources

About