Arabidopsis and Sunflower plants with increased xylem area show enhanced seed yield
| Autor: | Raquel Lia Chan, Julieta Virginia Cabello |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Arabidopsis Plant Science AUXIN Biology 01 natural sciences purl.org/becyt/ford/1 [https] Ciencias Biológicas 03 medical and health sciences Gene Expression Regulation Plant Xylem Auxin Helianthus annuus Genetics VASCULAR BUNDLES purl.org/becyt/ford/1.6 [https] Plant Proteins photoperiodism chemistry.chemical_classification Arabidopsis Proteins fungi food and beverages Cell Biology Bioquímica y Biología Molecular Plants Genetically Modified Vascular bundle biology.organism_classification Sunflower XYLEM AREA Horticulture 030104 developmental biology chemistry Seeds Helianthus SEED YIELD CIENCIAS NATURALES Y EXACTAS 010606 plant biology & botany Main stem |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| Popis: | Plant architecture plasticity determines the efficiency at harvesting and plays a major role defining biomass and seed yield. We observed that several previously described transgenic genotypes exhibiting increased seed yield also show wider stems and more vascular bundles than wild-type plants. Here, the relationship between these characteristics and seed yield was investigated. Hanging weight on the main stem of Arabidopsis plants provoked significant stem widening. Such widening was accompanied by an increase in the number of vascular bundles and about 100% of yield increase. In parallel, lignin deposition diminished. Vascular bundle formation started in the upper internode and continued downstream. AUX/LAX carriers were essential for this response. The increase of vascular bundles was reverted 3 weeks after the treatment leading to an enlarged xylem area. Aux1, lax1, and lax3 mutant plants were also able to enlarge their stems after the treatment, whereas lax2 plants did not. However, none of these mutants exhibited more vascular bundles or seed yield compared with untreated plants. Weight-induced xylem area enhancement and increased seed yield were also observed in sunflower plants. Altogether these results showed a strong correlation between the number of vascular bundles and enhanced seed yield under a long-day photoperiod. Furthermore, changes in the levels of auxin carriers affected both these processes in the same manner, suggesting that there may be an underlying causality. Fil: Cabello, Julieta Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Agrobiotecnología del Litoral. Universidad Nacional del Litoral. Instituto de Agrobiotecnología del Litoral; Argentina Fil: Chan, Raquel Lia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Agrobiotecnología del Litoral. Universidad Nacional del Litoral. Instituto de Agrobiotecnología del Litoral; Argentina |
| Databáze: | OpenAIRE |
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