The signal effect of nitrate supply enhances active forms of cytokinins and indole acetic content and reduces abscisic acid in wheat plants grown with ammonium

Garnica, María; Houdusse, Fabrice; Zamarreño, Ángel M.; García-Mina, José M.

doi:10.1016/j.jplph.2010.04.013

Cited by 57 publications

(49 citation statements)

References 56 publications

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“…2A and 3) suggest that it was the internal N content and not the external N supply, the critical factor limiting plant growth in maize. This regulation could be mediated by the cross-talk between N concentration and CKs (Garnica et al, 2010;Takei et al, 2004), as they have been reported to be positively correlated with the N status of the plant (Walch-Liu et al, 2005). In agreement with these works, the CK content in the leaves of maize increased with de N supply (Fig.…”

Section: Discussionsupporting

confidence: 86%

High nitrate supply reduces growth in maize, from cell to whole plant

Saiz-Fernández

Diego

Sampedro

et al. 2015

Journal of Plant Physiology

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Section: Discussionsupporting

confidence: 86%

High nitrate supply reduces growth in maize, from cell to whole plant

Saiz-Fernández

Diego

Sampedro

et al. 2015

Journal of Plant Physiology

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“…Similarly, aquaporin abundance or activity has been shown to be affected by ammonium nutrition, which could then be having a consequence in reduced radicular/root water uptake capacity [41]. Hormone balance deregulation could also be associated to nitrogen nutrition and stomatal mechanisms [42]. Nevertheless, the dose-dependent stomatal closure, exclusive of 7.5 mM ammonium under elevated CO 2, suggests the participation of a more sophisticated mechanism, involving not only the N source sensed by the root but also C availability and metabolism.…”

Section: Elevated Co 2 Differentially Affects Tomato Plants CV Agoramentioning

confidence: 99%

CO 2 enrichment modulates ammonium nutrition in tomato adjusting carbon and nitrogen metabolism to stomatal conductance

et al. 2015

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“…N nutritional status directly affects the CK level as well. N supplementation promotes CK accumulation in the bare root and xylem sap of maize, while low N causes a significant decrease in the CK concentration in wheat (Garnica et al, 2010;Takei et al, 2001). On the contrary, CKs regulate carbohydrate mobilization and N signaling (Ashikari et al, 2005;Sakakibara, 2006).…”

Section: Nutrient Supplies Played An Essential Role In Regulating Cormentioning

confidence: 99%

Integration of Hormonal and Nutritional Cues Orchestrates Progressive Corolla Opening

Sun

Zhao

et al. 2016

Plant Physiology

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Flower opening is essential for pollination and thus successful sexual reproduction; however, the underlying mechanisms of its timing control remain largely elusive. We identify a unique cucumber (Cucumis sativus) line '6457' that produces normal ovaries when nutrients are under-supplied, and super ovaries (87%) with delayed corolla opening when nutrients are oversupplied. Corolla opening in both normal and super ovaries is divided into four distinct phases, namely the green bud, green-yellow bud, yellow bud, and flowering stages, along with progressive color transition, cytological tuning, and differential expression of 14,282 genes. In the super ovary, cell division and cell expansion persisted for a significantly longer period of time; the expressions of genes related to photosynthesis, protein degradation, and signaling kinases were dramatically upregulated, whereas the activities of most transcription factors and stress-related genes were significantly down-regulated; concentrations of cytokinins (CKs) and gibberellins were higher in accordance with reduced cytokinin conjugation and degradation and increased expression of gibberellin biosynthesis genes. Exogenous CK application was sufficient for the genesis of super ovaries, suggesting a decisive role of CKs in controlling the timing of corolla opening. Furthermore, 194 out of 11,127 differentially expressed genes identified in pairwise comparisons, including critical developmental, signaling, and cytological regulators, contained all three types of cis-elements for CK, nitrate, and phosphorus responses in their promoter regions, indicating that the integration of hormone modulation and nutritional regulation orchestrated the precise control of corolla opening in cucumber. Our findings provide a valuable framework for dissecting the regulatory pathways for flower opening in plants.The flower is the most distinguishing organ in higher plants, and artists and scientists have been attracted to explore the mystery of flower structure and origin for decades. The evolution of flowering plants was greatly accelerated approximately 100 million years ago with the development of flowers, which were essential for recruiting animals to help distribute pollen and seeds (Danielson and Frommer, 2013). Flowers are produced from a specialized structure in the shoot tip called the shoot apical meristem, which consists of a pool of stem cells that continuously divide and replenish themselves (Fletcher et al., 1999). Morphologically, flowers are comprised of four basic structures arranged in concentric whorls: sepals in the outermost whorl 1, petals in whorl 2, stamens in whorl 3, and carpels in the innermost whorl 4. Bisexual flowers possess all four basic structures, while unisexual flowers lack one or more structures, usually the male organ stamen or the female organ carpel (Dellaporta and Calderon-Urrea, 1993). In flowering plants, approximately 90% species produce bisexual flowers, 6% species are dioecious with male and female flowers on separate plants, and 4% species a...

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The signal effect of nitrate supply enhances active forms of cytokinins and indole acetic content and reduces abscisic acid in wheat plants grown with ammonium

Cited by 57 publications

References 56 publications

High nitrate supply reduces growth in maize, from cell to whole plant

High nitrate supply reduces growth in maize, from cell to whole plant

CO 2 enrichment modulates ammonium nutrition in tomato adjusting carbon and nitrogen metabolism to stomatal conductance

Integration of Hormonal and Nutritional Cues Orchestrates Progressive Corolla Opening

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