Molecular mechanisms governing shade responses in maize

Shi, Qingbiao; Kong, Fanying; Zhang, Haisen; Jiang, Yue; Heng, Siqi; Ran, Liang; Ma, Lin; Liu, Jisheng; Lu, Xiaoduo; Li, Pinghua; Li, Gang

doi:10.1016/j.bbrc.2019.05.142

Cited by 27 publications

(17 citation statements)

References 22 publications

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“…A height response to neighboring plants was not observed in the young maize seedlings at the coleoptile stage used in our study (unpublished observations). Studies assessing the effect of neighboring plants on relatively mature maize plants have provided evidence for increases in mesocotyl length, leaf length, and overall plant height (Wang et al 2016;Shi et al 2019). A difference in second leaf-collar height, stem diameter, and shoot biomass has been reported in genetically identical plants grown under similar growing conditions as this study but sampled at the more advanced fourth leaf tip stage of development (Afifi and Swanton 2012).…”

Section: A High Proportion Of Genes Stably Up-regulated By Neighborinsupporting

confidence: 62%

The neonicotinoid insecticide thiamethoxam enhances expression of stress-response genes in Zea mays in an environmentally specific pattern

House

Swanton

Lukens

2020

Genome

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Recent studies indicate that thiamethoxam (TMX), a neonicotinoid insecticide, can affect plant responses to environmental stressors, such as neighboring weeds. The molecular mechanisms behind both stable and environmentally-specific responses to TMX likely involve genes related to defense/stress responses. We investigated the effect of a TMX seed treatment on global gene expression in maize coleoptiles both under normal conditions and under low red to far-red (R/FR) light stress induced by the presence of neighboring plants. The neighboring plant treatment upregulated genes involved in biotic and abiotic stress responses and also affected specific photosynthesis and cell-growth related genes. Low R:FR light may enhance maize resistance to herbivores and pathogens. TMX appears to compromise resistance. The TMX treatment stably repressed many genes that encode proteins involved in biotic stress responses, as well as cell-growth genes. Notably, TMX effects on many genes’ expression were conditional on the environment. In response to low R:FR, plants treated with TMX engage genes in the JA, and other stress-related, response pathways. Neighboring weeds may condition TMX treated plants to become more stress tolerant.

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Section: A High Proportion Of Genes Stably Up-regulated By Neighborinsupporting

confidence: 62%

The neonicotinoid insecticide thiamethoxam enhances expression of stress-response genes in Zea mays in an environmentally specific pattern

House

Swanton

Lukens

2020

Genome

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“…Maize is a particularly well-studied species with respect to shade-avoidance responses and it is among the world's most important crops. phyB1 mutants in maize are constitutively elongated and early flowering (Sheehan et al, 2007), similar to that observed in Arabidopsis (Franklin et al, 2003), and FR enrichment accordingly stimulates shoot elongation (Dubois et al, 2010;Shi et al, 2019). Inspired by knowledge from Arabidopsis research, parts of the signaling pathway in maize were also elucidated.…”

Section: Shade Responses In Cropsmentioning

confidence: 78%

Control of Plant Growth and Defense by Photoreceptors: From Mechanisms to Opportunities in Agriculture

Pierik

Ballaré

2021

Molecular Plant

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“…Our recent study revealed that ectopic expression of maize PIF4 and PIF5 in Arabidopsis pifq mutant completely rescued its impaired shade avoidance response, which indicated that PIF proteins might play conserved roles in shade response (Shi et al, 2018b). Transcriptome analyses further indicated that maize and Arabidopsis might share very conserved regulatory pathways of shade avoidance response (Wang et al, 2016; Shi et al, 2018a). Besides the well-known shade avoidance response, how shade-tolerant plants increase their survival and fitness in various shade conditions remains to be further investigated.…”

Section: Understanding Shade Responses: Future Perspectivesmentioning

confidence: 99%

Auxin-Dependent Cell Elongation During the Shade Avoidance Response

2019

Front. Plant Sci.

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Plant uses multiple photoreceptors and downstream components to rapidly respond to dynamic changes in environmental light. Under shade conditions, many species exhibit shade avoidance responses that promote stem and petiole elongation, thus helping plants reach the sunlight. In the last few years, the regulatory molecular mechanisms by which plants respond to shade signals have been intensively studied. This review discusses the regulatory mechanisms underlying auxin-mediated cell elongation in the shade avoidance responses. In the early response to shade signals, auxin biosynthesis, transport, and sensitivity are all rapidly activated, thus promoting cell elongation of the hypocotyls and other organs. Under prolonged shade, increased auxin sensitivity—rather than increased auxin biosynthesis—plays a major role in cell elongation. In addition, we discuss the interaction network of photoreceptors and Phytochrome-Interacting Factors, and the antagonistic regulation of Auxin/Indole Acetic Acid proteins by auxin and light. This review provides perspectives to reframe how we think about shade responses in the natural environment.

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Molecular mechanisms governing shade responses in maize

Cited by 27 publications

References 22 publications

The neonicotinoid insecticide thiamethoxam enhances expression of stress-response genes in Zea mays in an environmentally specific pattern

The neonicotinoid insecticide thiamethoxam enhances expression of stress-response genes in Zea mays in an environmentally specific pattern

Control of Plant Growth and Defense by Photoreceptors: From Mechanisms to Opportunities in Agriculture

Auxin-Dependent Cell Elongation During the Shade Avoidance Response

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