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30 results for “root allocation”
Re-allocation of nitrogen and phosphorus from roots drives regrowth of grasses and sedges after defoliation under deficit irrigation and nitrogen enrichment
<p>1. Re-allocation of nutrients from roots to shoots is essential for plant regrowth in grasslands, particularly in nutrient-poor conditions. However, the response of root nutrient re-allocation to changes in nitrogen (N) and water availability remains largely unknown.</p> <p><span>2. Using a novel <sup>15</sup>N and <sup>32</sup>P labelling technique, we quantified the contribution of N and phosphorus (P) to shoot regrowth from either root re-allocation or direct soil uptake for perennial grasses exposed to high-frequency deficit irrigation (HFDI) and N addition. </span></p> <p><span>3. Without N addition, HFDI showed no impact on uptake and re-allocation of N and P, likely due to unaffected soil N availability and a greater diffusion barrier offsetting increased accumulation in plant-available soil P. With N addition, HFDI increased plant N rather than P uptake, because of increasing soil N availability instead of P under combined HFDI and N addition. The HFDI decreased both N and P re-allocation with N addition, possibly due to exhaustion of nutrient reserves in roots that were re-allocated aboveground. Re-allocation contributed 48-97% of N and 58-79% of P required during the first two weeks of shoot regrowth. </span></p> <p><span>4. <i>Synthesis</i>. Our results highlight the importance of N and P re-allocation from roots to buffer against changes in soil N and P availability and to maintain N:P ratio in shoot regrowth.</span></p>
Data from: Effects of increased N and P availability on biomass allocation and root carbohydrate reserves differ between N‐fixing and non‐N‐fixing savanna tree seedlings
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Data from: Root:shoot ratio in developing seedlings: how seedlings change their allocation in response to seed mass and ambient nutrient supply
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Re-allocation of nitrogen and phosphorus from roots drives regrowth of grasses and sedges after defoliation under deficit irrigation and nitrogen enrichment
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Data from: Corrections for rooting volume and plant size reveal negative effects of neighbour presence on root allocation in pea
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Data from: Root and shoot glucosinolate allocation patterns follow optimal defence allocation theory
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Data from: Locally and systemically induced glucosinolates follow optimal defence allocation theory upon root herbivory
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Data from: Optimal allocation ratios: A square root relationship between the ratios of symbiotic costs and benefits
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Root growth and branching are enabled by brassinosteroid-regulated growth anisotropy and carbon allocation
GEO Series GSE274161. Arabidopsis thaliana. 20 samples. Type: Expression profiling by high throughput sequencing.
SHORT-ROOT Stabilizes PHOSPHATE1 to Regulate Phosphate Allocation in Arabidopsis
GEO Series GSE199834. Arabidopsis thaliana. 6 samples. Type: Expression profiling by high throughput sequencing.
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