Why some leaves are anthocyanic and why most anthocyanic leaves are red?

Manetas, Yiannis

doi:10.1016/j.flora.2005.06.010

Cited by 226 publications

(200 citation statements)

References 140 publications

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“…The question of a functional significance of anthocyanin pigments in leaves has received substantial attention in the recent literature (Archetti et al, 2009;ChalkerScott, 1999;Manetas, 2006). Comparatively little attention has been given to the question of why only certain species change leaf colour from green to red during certain ontogenetic stages or seasons while others do not.…”

Section: Analysesmentioning

confidence: 99%

Salt-Induced Changes in Antioxidative Enzyme Activities in Shoot Tissues of Two Atriplex Varieties

Kachout¹,

Hamza²,

Bouraoui³

et al. 2013

Not Bot Hort Agrobot Cluj

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This study examined the influence of salt levels on antioxidant activity and content of carotenoids and anthocyanins of the A. hortensis leaves using two varieties: green orach (var. purpurea) and red orach (var. rubra). Seeds of Atriplex were exposed to 0, 90, 180 and 260 mM NaCl for 3 months and seeds were sown in an earthen pot. Overall levels of ascorbate peroxidase (APX) and glutathione reductase (GR) activity were significantly elevated. Salt stress caused a significant decline in tissue concentrations of catalase (CAT) and superoxide dismutase (SOD). However, 90 mM NaCl did not modify these parameters, which remains similar to control values. Activities of APX and CAT were increase whether the shoots of A. hortensis var. purpurea were grown in the presence of 180 mM NaCl. Thus although some indications of oxidative stress accompany exposure of this salt-tolerant Atriplex varieties to salinity, mechanisms appear to exist within its shoot tissue to permit the tolerance of such oxidative stress. High salt concentration in the culture medium provokes oxidative damage in Atriplex leaves and induces a general increase in antioxidant enzyme activity. In particular, NaCl toxicity decreased content of carotenoids. It also decreased the concentration of anthocyanin pigments in leaves of Atriplex. This work therefore provides a starting point towards a better understanding of the role of antioxidant enzyme in the plant response against salt stress.

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Section: Analysesmentioning

confidence: 99%

Salt-Induced Changes in Antioxidative Enzyme Activities in Shoot Tissues of Two Atriplex Varieties

Kachout¹,

Hamza²,

Bouraoui³

et al. 2013

Not Bot Hort Agrobot Cluj

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“…Additional interest in the role of colours in host selection of aphids was recently created by the debate on autumn leaf colouration as a potential signal or cue to aphids (e.g., Sinkkonen 2006), initiated by a paper from Hamilton and Brown (2001); for a review see Manetas (2006). However, in this debate, the perspective of colour perception by the aphids appears to have been largely neglected.…”

Section: Introductionmentioning

confidence: 99%

Visual ecology of aphids—a critical review on the role of colours in host finding

Döring

Chittka

2007

Arthropod-Plant Interactions

197

222

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We review the rich literature on behavioural responses of aphids (Hemiptera: Aphididae) to stimuli of different colours. Only in one species there are adequate physiological data on spectral sensitivity to explain behaviour crisply in mechanistic terms. Because of the great interest in aphid responses to coloured targets from an evolutionary, ecological and applied perspective, there is a substantial need to expand these studies to more species of aphids, and to quantify spectral properties of stimuli rigorously. We show that aphid responses to colours, at least for some species, are likely based on a specific colour opponency mechanism, with positive input from the green domain of the spectrum and negative input from the blue and/ or UV region. We further demonstrate that the usual yellow preference of aphids encountered in field experiments is not a true colour preference but involves additional brightness effects. We discuss the implications for agriculture and sensory ecology, with special respect to the recent debate on autumn leaf colouration. We illustrate that recent evolutionary theories concerning aphid-tree interactions imply far-reaching assumptions on aphid responses to colours that are not likely to hold. Finally we also discuss the implications for developing and optimising strategies of aphid control and monitoring.

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“…28 In other studies that favored the co-evolutionary signaling hypothesis, 7,8,[29][30][31] aposematism was not discussed. Interestingly, Lee and Gould, 17 Lee, 32 Gould, 19 Sherratt et al 33 Karageorgou and Manetas, 34 Manetas, 35 Chittka and Döring, 12 Schaefer and Rolshausen 36 and Karageorgou et al 37 interpreted the co-evolutionary hypothesis of autumn coloration presented in the papers by Archetti, 6 Hamilton and Brown 7 and Archetti and Brown 8 as a case of visual aposematism (warning coloration), in spite of the authors' differing view.…”

Section: Acknowledgementsmentioning

confidence: 97%

The shared and separate roles of aposematic (warning) coloration and the co-evolution hypothesis in defending autumn leaves

Lev‐Yadun

2010

Plant Signaling & Behavior

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Why some leaves are anthocyanic and why most anthocyanic leaves are red?

Cited by 226 publications

References 140 publications

Salt-Induced Changes in Antioxidative Enzyme Activities in Shoot Tissues of Two Atriplex Varieties

Salt-Induced Changes in Antioxidative Enzyme Activities in Shoot Tissues of Two Atriplex Varieties

Visual ecology of aphids—a critical review on the role of colours in host finding

The shared and separate roles of aposematic (warning) coloration and the co-evolution hypothesis in defending autumn leaves

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