phytohormone/atrophy

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Brassinosteroids function in spikelet differentiation and degeneration in rice.

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Brassinosteroids (BRs) play crucial roles in many aspects of plant development. However, their function in spikelet differentiation and degeneration in rice (Oryza sativa L.) remains unclear. Here, we investigated the roles of these phytohormones in spikelet development in field-grown rice subjected

Current Advances in Molecular Mechanisms and Physiological Basis of Panicle Degeneration in Rice.

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Panicle degeneration, also known as panicle abortion, is a serious defect and causes heavy losses to reproductive yield in cereals. Several mutants have been reported to display the phenotype of spikelet abortion in rice. Recent findings have resulted in significant breakthroughs, but comprehensive

Plant Omics: Isolation, Identification, and Expression Analysis of Cytochrome P450 Gene Sequences from Coleus forskohlii.

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The omics analyses of plants and the agrigenomics field offer the opportunity to better characterize our ecosystems. In this context, characterization of cytochrome P450 genes (CYP450s), which constitute one of the largest gene families in plants, is important. They play vital roles in biosynthesis

Increased Expression of 9-Cis-Epoxycarotenoid Dioxygenase, PtNCED1, Associated With Inhibited Seed Germination in a Terrestrial Orchid, Phaius tankervilliae.

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The phytohormone abscisic acid (ABA) is involved in regulating seed dormancy and germination. A crucial step of ABA biosynthesis in higher plants is the oxidative cleavage of cis-epoxycarotenoids by 9-cis-epoxycarotenoid dioxygenase (NCED). Seed development in orchids is unusual because the embryos

Deep conservation of cis-element variants regulating plant hormonal responses.

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Phytohormones regulate many aspects of plant life by activating transcription factors (TF) that bind sequence-specific response elements (RE) in regulatory regions of target genes. Despite their short length, REs are degenerate with a core of just 3-4bp. This degeneracy is paradoxical, as it reduces

Molecular cloning of a coiled-coil-nucleotide-binding-site-leucine-rich repeat gene from pearl millet and its expression pattern in response to the downy mildew pathogen.

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Downy mildew caused by Sclerospora graminicola is a devastating disease of pearl millet. Based on candidate gene approach, a set of 22 resistance gene analogues were identified. The clone RGPM 301 (AY117410) containing a partial sequence shared 83% similarity to rice R-proteins. A full-length R-gene

Antisense suppression of phospholipase D alpha retards abscisic acid- and ethylene-promoted senescence of postharvest Arabidopsis leaves.

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Membrane disruption has been proposed to be a key event in plant senescence, and phospholipase D (PLD; EC 3.1.4.4) has been thought to play an important role in membrane deterioration. We recently cloned and biochemically characterized three different PLDs from Arabidopsis. In this study, we

Age and sex-related changes in cytokinins, auxins and abscisic acid in a centenarian relict herbaceous perennial.

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It is still an unsolved question of fundamental biology if, and how, perennial plants senesce. Here, age- and sex-related changes in phytohormones were tested in Borderea pyrenaica, a small dioecious geophyte relict of the Tertiary with one of the longest lifespan ever recorded for any non-clonal

Photoaffinity labelling with the cytokinin agonist azido-CPPU of a 34 kDa peptide of the intracellular pathogenesis-related protein family in the moss Physcomitrella patens.

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As in higher plants, the development of the moss Physcomitrella patens is regulated by environmental signals and phytohormones. At the protonema level transition from chloronema to caulonema cells is under auxin control. The formation on second sub-apical caulonema cells of buds that will give rise

Purification, molecular cloning and ethylene-inducible expression of a soluble-type epoxide hydrolase from soybean (Glycine max [L.] Merr.).

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A soybean protein was purified from mature dry seeds. Amino-acid sequencing of the nine internal peptides derived from this N-terminally blocked protein showed that it has a significant similarity to the soluble epoxide hydrolases known to date. A degenerate series of 23-mer oligonucleotides with

Molecular cloning and characterization of aldehyde oxidases in Arabidopsis thaliana.

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Using degenerate primers designed by deduced amino acid sequences of known aldehyde oxidases (AO) from maize and bovine, two independent cDNA fragments were amplified by reverse transcription-polymerase chain reaction (PCR). The two corresponding full-length cDNAs (atAO-1 and atAO-2; 4,484 and 4,228

Early intervention with ABA prevents neuroinflammation and memory impairment in a triple transgenic mice model of Alzheimer´s disease.

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Neuroinflammation and insulin resistance in the brain are intimately linked to neurodegenerative disorders, including Alzheimer's disease. Even though traditionally Alzheimer´s disease has been associated to Aβ deposits and hyperphosphorylated Tau intracellular tangles, several studies show that

Expression of Phospholipase D during Castor Bean Leaf Senescence.

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Membrane deterioration in plant senescence is commonly associated with progressive decreases in membrane phospholipid content. This study investigated the expression and regulation of phospholipase D (PLD; EC 3.1.4.4) during senescence in castor bean (Ricinus communis L. cv Hale) leaf discs. The

Bioproduction and optimization of rosmarinic acid production in Solenostemon scutellarioides through media manipulation and conservation of high yielding clone via encapsulation.

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The present study describes the role of different exogenous phytohormones, polyamines and sucrose on growth and rosmarinic acid (RA) production in whole plant culture of Solenostemon scutellarioides. It was further aimed to conserve elite clones via synthetic seed technology. S. scutellarioides was

ABA and IAA control microsporogenesis in Petunia hybrida L.

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The formation of fertile male gametophyte is known to require timely degeneration of polyfunctional tapetum tissue. The last process caused by the programmed cell death (PCD) is a part of the anther program maturation which leads to sequential anther tissue destruction coordinated with pollen

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