The shade-avoidance syndrome: multiple signals and ecological consequences

被引:324
|
作者
Ballare, Carlos L. [1 ,2 ]
Pierik, Ronald [3 ]
机构
[1] Univ Buenos Aires, IFEVA, CONICET, Ave San Martin 4453C1417DSE, Buenos Aires, DF, Argentina
[2] Univ Nacl San Martin, IIB INTECH, CONICET, B1650HMP, Buenos Aires, DF, Argentina
[3] Univ Utrecht, Plant Ecophysiol, Inst Environm Biol, Padualaan 8, NL-3584 CH Utrecht, Netherlands
来源
PLANT CELL AND ENVIRONMENT | 2017年 / 40卷 / 11期
关键词
light quality; shade; hormones; signalling; phytochrome; herbivory; pathogens; Jasmonate; FAR-RED LIGHT; VOLATILE ORGANIC-COMPOUNDS; PHYTOCHROME-B; UV-B; BLUE-LIGHT; CANOPY LIGHT; PLANT-GROWTH; FLUENCE-RATE; TRANSCRIPTION FACTORS; HYPOCOTYL ELONGATION;
D O I
10.1111/pce.12914
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Plants use photoreceptor proteins to detect the proximity of other plants and to activate adaptive responses. Of these photoreceptors, phytochrome B (phyB), which is sensitive to changes in the red (R) to far-red (FR) ratio of sunlight, is the one that has been studied in greatest detail. The molecular connections between the proximity signal (low R:FR) and a model physiological response (increased elongation growth) have now been mapped in considerable detail in Arabidopsis seedlings. We briefly review our current understanding of these connections and discuss recent progress in establishing the roles of other photoreceptors in regulating growth-related pathways in response to competition cues. We also consider processes other than elongation that are controlled by photoreceptors and contribute to plant fitness under variable light conditions, including photoresponses that optimize the utilization of soil resources. In examining recent advances in the field, we highlight emerging roles of phyB as a major modulator of hormones related to plant immunity, in particular salicylic acid and jasmonic acid (JA). Recent attempts to manipulate connections between light signals and defence in Arabidopsis suggest that it might be possible to improve crop health at high planting densities by targeting links between phyB and JA signalling.
引用
收藏
页码:2530 / 2543
页数:14
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