Barley genetics and seed physiology
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Barley genetics and seed physiology
Putting life-cycle events of barley on the map
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BRASSINOSTEROID INSENSITIVE2 Interacts with ABSCISIC ACID INSENSITIVE5 to Mediate the Antagonism of Brassinosteroids to Abscisic Acid during Seed Germination in Arabidopsis

BRASSINOSTEROID INSENSITIVE2 Interacts with ABSCISIC ACID INSENSITIVE5 to Mediate the Antagonism of Brassinosteroids to Abscisic Acid during Seed Germination in Arabidopsis | Barley genetics and seed physiology | Scoop.it
Seed germination and postgerminative growth are regulated by a delicate hormonal balance. Abscisic acid (ABA) represses Arabidopsis thaliana seed germination and postgerminative growth, while brassinosteroids (BRs) antagonize ABA-mediated inhibition and promote these processes. However, the molecular mechanism underlying BR-repressed ABA signaling remains largely unknown. Here, we show that the Glycogen Synthase Kinase 3-like kinase BRASSINOSTEROID INSENSITIVE2 (BIN2), a critical repressor of BR signaling, positively regulates ABA responses during seed germination and postgerminative growth. Mechanistic investigation revealed that BIN2 physically interacts with ABSCISIC ACID INSENSITIVE5 (ABI5), a bZIP transcription factor. Further genetic analysis demonstrated that the ABA-hypersensitive phenotype of BIN2-overexpressing plants requires ABI5. BIN2 was found to phosphorylate and stabilize ABI5 in the presence of ABA, while application of epibrassinolide (the active form of BRs) inhibited the regulation of ABI5 by BIN2. Consistently, the ABA-induced accumulation of ABI5 was affected in BIN2-related mutants. Moreover, mutations of the BIN2 phosphorylation sites on ABI5 made the mutant protein respond to ABA improperly. Additionally, the expression of several ABI5 regulons was positively modulated by BIN2. These results provide evidence that BIN2 phosphorylates and stabilizes ABI5 to mediate ABA response during seed germination, while BRs repress the BIN2-ABI5 cascade to antagonize ABA-mediated inhibition.

Via Christophe Jacquet, Mary Williams
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Diverse accumulation and distribution of nutrient elements in developing wheat grain studied by laser ablation inductively coupled plasma mass spectrometry imaging - Metallomics (RSC Publishing)

The present study focused on the elemental distribution in the developing wheat grain by using the laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) imaging technique. Our studies show that the embryo accumulated high concentrations of nutrient elements, such as Fe, K, Cu, and Zn, while
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The roles of histone acetylation in seed performance and plant development

The roles of histone acetylation in seed performance and plant development | Barley genetics and seed physiology | Scoop.it
Abstract
Histone acetylation regulates gene transcription by chromatin modifications and plays a crucial role in the plant development and response to environment cues. The homeostasis of histone acetylation is controlled by histone acetyltransferases (HATs) and histone deacetylases (HDACs) in different plant tissues and development stages. The vigorous knowledge of the function and co-factors about HATs (e.g. GCN5) and HDACs (e.g. HDA19, HDA6) has been obtained from model plant Arabidopsis. However, understanding individual role of other HATs and HDACs require more work, especially in the major food crops such as rice, maize and wheat. Many co-regulators have been recently identified to function as a component of HAT or HDAC complex in some specific developmental processes. The described findings show a distinctive and interesting epigenetic regulation network composed of HATs, HDACs and co-regulators playing crucial roles in the seed performance, flowering time, plant morphogenesis, plant response to stresses etc. In this review, we summarized the recent progresses and suggested the perspective of histone acetylation research, which might provide us a new window to understand the epigenetic code of plant development and to improve the crop production and quality.

Via Andres Zurita
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Andres Zurita's curator insight, November 3, 2014 7:48 AM
Highlights

• Increasing knowledges about histone acetylation give new clues for plant epigenetics.

• Histone acetylation plays roles in seed development, performance and plant growth.• Co-regulators determine the function specificity of histone (de)acetylation complex.
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Plant domestication versus crop evolution: a conceptual framework for cereals and grain legumes: Trends in Plant Science

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Parthenocarpic potential in Capsicum annuum L. is enhanced by carpelloid structures and controlled by a single recessive gene

Parthenocarpic potential in Capsicum annuum L. is enhanced by carpelloid structures and controlled by a single recessive gene | Barley genetics and seed physiology | Scoop.it
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Expression Patterns of ABA and GA Metabolism Genes and Hormone Levels during Rice Seed Development and Imbibition: A Comparison of Dormant and Non-Dormant Rice Cultivars

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Natural Variations and Genome-Wide Association Studies in Crop Plants - Annual Review of Plant Biology, 65(1):531

Natural Variations and Genome-Wide Association Studies in Crop Plants - Annual Review of Plant Biology, 65(1):531 | Barley genetics and seed physiology | Scoop.it
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The occurrence of dicotyledonar embryos in Agave tequilana - Online First - Springer

The occurrence of dicotyledonar embryos in Agave tequilana - Online First - Springer | Barley genetics and seed physiology | Scoop.it
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Tomato Analyzer: A Useful Software Application to... | Protocol

Tomato Analyzer: A Useful Software Application to... | Protocol | Barley genetics and seed physiology | Scoop.it
Tomato Analyzer (TA) quantifies attributes of two dimensional shapes and color in a reproducible and accurate manner. A step-by-step...
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Regulation of programmed cell death in maize endosperm by abscisic acid - Springer

Regulation of programmed cell death in maize endosperm by abscisic acid - Springer | Barley genetics and seed physiology | Scoop.it
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Programmed cell death: similarities and differences in animals and plants. A flower paradigm - Springer

Programmed cell death: similarities and differences in animals and plants. A flower paradigm - Springer | Barley genetics and seed physiology | Scoop.it
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BMC Biology | Article collections | Beyond Mendel: modeling in biology

BMC Biology | Article collections | Beyond Mendel: modeling in biology | Barley genetics and seed physiology | Scoop.it

I just found this - useful collection of article about modeling in biology. The 2010 article by Lander, "The edges of understanding" would be a good way to start a discussion about the hows and whys of biologica modeling with your students.


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ibexerain's comment, January 13, 2015 12:05 AM
Thanks
ropesemphasize's comment, January 14, 2015 1:47 AM
Incredible
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Nature Outlook : Rice

Nature Outlook : Rice | Barley genetics and seed physiology | Scoop.it

Nature Supplement

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Andres Zurita's curator insight, November 3, 2014 7:18 AM

A simple grain with global impact, rice has helped to build empires and fed revolutions. Now, scientists are starting a rice revolution of their own to feed a hungry world. By decoding genetics, improving breeding and, perhaps, reshaping the plant's biology, researchers are working to take the world’s most vital crop into the future.

 

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The Genetic Basis of Natural Variation in Seed Size and Seed Number and Their Trade-Off Using Arabidopsis thaliana MAGIC Lines

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Aucsia Gene Silencing Causes Parthenocarpic Fruit Development in Tomato

Aucsia Gene Silencing Causes Parthenocarpic Fruit Development in Tomato | Barley genetics and seed physiology | Scoop.it
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The ecophysiology of seed persistence: a mechanistic view of the journey to germination or demise - Long - 2014 - Biological Reviews - Wiley Online Library

The ecophysiology of seed persistence: a mechanistic view of the journey to germination or demise - Long - 2014 - Biological Reviews - Wiley Online Library | Barley genetics and seed physiology | Scoop.it
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Phenotypic and Transcriptional Analysis of Divergently Selected Maize Populations Reveals the Role of Developmental Timing in Seed Size Determination

Phenotypic and Transcriptional Analysis of Divergently Selected Maize Populations Reveals the Role of Developmental Timing in Seed Size Determination | Barley genetics and seed physiology | Scoop.it
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Genetic bases of rice grain shape: so many genes, so little known: Trends in Plant Science

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Measuring genome size of desert plants using dry seeds - Botany

Measuring genome size of desert plants using dry seeds - Botany | Barley genetics and seed physiology | Scoop.it
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Seed and seedling traits affecting critical life stage transitions and recruitment outcomes in dryland grasses - Larson - Journal of Applied Ecology - Wiley Online Library

Seed and seedling traits affecting critical life stage transitions and recruitment outcomes in dryland grasses - Larson - Journal of Applied Ecology - Wiley Online Library | Barley genetics and seed physiology | Scoop.it
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LeafJ: An ImageJ Plugin for Semi-automated Leaf Shape... | Protocol

LeafJ: An ImageJ Plugin for Semi-automated Leaf Shape... | Protocol | Barley genetics and seed physiology | Scoop.it
Demonstration of key methods for high throughput leaf measurements. These methods can be used to accelerate leaf phenotyping when...
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Innate immunity in plants and animals: striking similarities and obvious differences - Nürnberger - 2004 - Immunological Reviews - Wiley Online Library

Innate immunity in plants and animals: striking similarities and obvious differences - Nürnberger - 2004 - Immunological Reviews - Wiley Online Library | Barley genetics and seed physiology | Scoop.it
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