Different Plant Hormones Regulate Similar Processes through Largely Nonoverlapping Transcriptional Responses

Nemhauser, Jennifer L.; Hong, Fangxin; Chory, Joanne

doi:10.1016/j.cell.2006.05.050

Cited by 855 publications

(861 citation statements)

References 33 publications

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“…This theory fits the recent idea according to which plant hormones have very few common downstream targets, and in some cases regulate distinct members of a given gene family [36]. Hence, detailed expression patterns combined with functional mapping of other plant hormones should be tested.…”

Section: Epidermis Control Of Cell Expansion -The Hormone Aspectsupporting

confidence: 74%

Growth coordination and the shoot epidermis

Savaldi-Goldstein

Chory

2008

Current Opinion in Plant Biology

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SummaryCell-cell communication is essential for growth and development of multicellular organisms. In higher plants, the shoot organs are derived from three clonally distinct cell layers present in the meristem. The role of the outermost L1 cell-layer and its derived epidermis in coordinating growth of the inner cell-layers has long been debated. This question has been revisited recently using molecular tools to manipulate cell cycle progression or cell expansion, specifically in the epidermis. These studies conclude that cells in the epidermis both promote and restrict growth of the entire shoot by sending growth signals-either physical or chemical-to the inner layers.

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Section: Epidermis Control Of Cell Expansion -The Hormone Aspectsupporting

confidence: 74%

Growth coordination and the shoot epidermis

Savaldi-Goldstein

Chory

2008

Current Opinion in Plant Biology

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“…Moreover, HBL manage to overcome the Niinduced damage in terms of nodule nitrogen, carbohydrate and leghemoglobin content and activity of nitrate reductase and nitrogenase (Fig. 1a-e) that may be because of BR and ABA act antagonistically and co-regulate various developmental process related to nitrogen metabolism (Finkelstein et al 2008;Chan and Gresshoff 2009) and the expression of hundreds of genes (Nemhauser et al 2006).…”

Section: Discussionmentioning

confidence: 99%

Brassinosteroid-mediated evaluation of antioxidant system and nitrogen metabolism in two contrasting cultivars of Vigna radiata under different levels of nickel

Yusuf

Fariduddin

Ahmad

et al. 2014

Physiol Mol Biol Plants

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The role of 28-homobrassinolide (HBL) in countering nickel-induced oxidative damage through overexpression of antioxidant enzymes and proline in Vigna radiata has been investigated. Two varieties of V. radiata, one sensitive to Ni (PDM-139) and the other tolerant to Ni (T-44), were sown in the soil fed with different levels (0, 50, 100 or 150 mg kg −1 ) of Ni, and at 29-day stage, foliage of plants was applied with deionized water (control), 10 −8 or 10 −6 M of HBL. The plants were sampled at 45-day stage of growth to assess various physiological as well as biochemical characteristics. The remaining plants were allowed to grow up to maturity to study the yield characteristics. The growth traits, leghemoglobin, nitrogen and carbohydrate content in the nodules, leaf chlorophyll content, photosynthesis efficiency, leaf water potential, activities of nitrate reductase, carbonic anhydrase and nitrogenase decreased proportionately with the increasing concentrations of nickel, whereas electrolyte leakage, various antioxidant enzymes viz. catalase, peroxidase and superoxide dismutase and accumulation of proline increased at 45-day stage. However, the exogenously applied HBL to the nickel-stressed or non-stressed plants improved growth, nodulation and photosynthesis and further enhanced the various antioxidant enzymes viz. catalase, peroxidase and superoxide dismutase and accumulation of proline. The deleterious impact of Ni on the plants was concentration dependent where HBL applied to the foliage induced overexpression of antioxidant enzyme and accumulation of proline (osmolyte) which could have conferred tolerance to Ni up to 100 mg kg −1 , resulting in improved growth, nodulation, photosynthesis and yield attributes.

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“…Phytohormones have direct (involved in cell division or cell growth) or indirect (interacting with other hormones or molecules) effects on plants. Over the last years, a multitude of models have been proposed to show how plant hormones interact to control plant development ( Jaillais and Chory, 2010;Nemhauser et al, 2006;Santner and Estelle, 2009).…”

Section: The Plant Hormone Auxinmentioning

confidence: 99%

Auxin Control in the Formation of Adventitious Roots

Pop

Pamfil

Bellini

2011

Not Bot Hort Agrobot Cluj

140

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Adventitious rooting is a complex process and a key step in the vegetative propagation of economically important woody, horticultural and agricultural species, playing an important role in the successful production of elite clones. The formation of adventitious roots is a quantitative genetic trait regulated by both environmental and endogenous factors. Among phytohormones, auxin plays an essential role in regulating roots development and it has been shown to be intimately involved in the process of adventitious rooting. Great progress has been made in elucidating the auxin-induced genes and auxin signaling pathway, especially in auxin response Aux/IAA and Auxin Response Factor gene families. Although some important aspects of adventitious and lateral rooting signaling have been revealed, the intricate signaling network remains poorly understood. This review summarizes some of the current knowledge on the physiological aspects of adventitious root formation and highlights the recent progress made in the identification of putative molecular players involved in the control of adventitious rooting. Despite much has been discovered regarding the effects and regulation of auxins on plant growth since the Darwin experiments, there is much that remains unknown.

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Different Plant Hormones Regulate Similar Processes through Largely Nonoverlapping Transcriptional Responses

Cited by 855 publications

References 33 publications

Growth coordination and the shoot epidermis

Growth coordination and the shoot epidermis

Brassinosteroid-mediated evaluation of antioxidant system and nitrogen metabolism in two contrasting cultivars of Vigna radiata under different levels of nickel

Auxin Control in the Formation of Adventitious Roots

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