Relative growth rate and biomass allocation in 20 <i>Aegilops</i> (Poaceae) species

Villar, Rafael; Veneklaas, Erik J.; Jordano, Pedro; Lambers, Hans

doi:10.1111/j.1469-8137.1998.00286.x

Cited by 34 publications

(20 citation statements)

References 47 publications

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“…Yet, plants growing in smaller trays allocated a larger proportion of their biomass to the production of leaves and/or roots and less to the formation of stolons. Such a bias favoring larger LMRs is known to increase relative growth rates [29,30]. In this context, we note that during early sampling times, LMRs were generally smaller while SMRs were generally larger in the largest trays compared to the smaller ones, consistent with the observation that total plant biomass and ramet number were smaller in the larger than in the smaller trays.…”

Section: Discussionsupporting

confidence: 73%

Do plants explore habitats before exploiting them? An explicit test using two stoloniferous herbs

2012

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We tested whether the processes of exploration and exploitation can be explicitly distinguished as plants grow and develop within a habitat using two stoloniferous clonal herbs, Hydrocotyle sibthorpioides (Umbelliferae) and Potentilla anserina (Rosaceae). Ramets were planted in four circular trays differing in diameter. One replicate from each diameter-group was sampled at intervals corresponding to plant coverage of the trays, and plant biomass allocation to leaves, stolons, and roots and internode length were quantified. For both species, at early sampling times (when the smallest trays were full), total plant biomass and ramet number were larger in the smaller trays than in the larger trays. However, this trend was reversed for plants collected at later times. For H. sibthorpioides, leaf mass ratios (leaf mass to total plant mass) were significantly greater, but stolon mass ratios (stolon mass to total plant mass) were less in the small trays than in the larger ones, particularly during the early stages of the experiment. Similarly, for P. anserina, leaf mass ratios decreased in the smaller trays but increased in the larger ones as the experiment progressed. Root mass ratios showed contrasting pattern to leaf mass ratios for both species; stolon mass ratios were significantly smaller in the smaller trays than in the larger ones, although there were no obvious patterns during the course of the experiment. In addition, for both species, internode length was shorter but the number of ramets was greater in the smaller trays at early sampling times. We conclude that plants invest greater biomass in resource-exploring organs (stolons) than in resource-exploiting organs (leaves or roots) as they initially establish in a habitat. The relatively lower plant productivity in the largest trays at early sampling times presumably reflects the cost of exploration prior to resource exploitation and utilization.clonal plant, foraging behavior, exploring and exploiting behavior, biomass allocation, life history tradeoff

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Section: Discussionsupporting

confidence: 73%

Do plants explore habitats before exploiting them? An explicit test using two stoloniferous herbs

2012

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“…Wild species related to bread wheat show remarkable genetic diversity essential to the improvement of the quality of cultivated plants. The D genome originating from A. tauschii is considered a potential donor of traits associated with the vigour of grain, including germination capacity [30,41,42]. The principal regions on D genome associated with grain germination provide a common location for the genes coding for D-type cyclins (1D) and cytochrome 450 genes (P450 gene family), spermitine synthase 1 (SPDSY 1) (7D), and protein synthase gene.…”

Section: Discussionmentioning

confidence: 99%

QTL mapping for germination of seeds obtained from previous wheat generation under drought

et al. 2014

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The QTLs controlling germination and early seedling growth were mapped using seeds acquired from mapping population and parental lines of Chinese Spring and SQ1 grown under water-limited conditions, severe drought (SDr) and well-watered plants (C). Germination ability was determined by performing a standard germination test based on the quantification of the germination percentage (GP24) of seeds incubated for 24 h at 25°C in the dark. Early seedling growth was evaluated on the basis of the length of the root and leaf at the 6th day of the experiment. QTLs were identified by composite interval mapping method using Windows QTLCartographer 2.5 software. For the traits studied, a total of thirty eight additive QTLs were identified. Seventeen QTLs were mapped in C on chromosomes: 1A, 2A, 7A, 1B, 2B, 3B, 4B, 5B, 6B, 7B, 2D, 3D, 4D and 6D, while twenty one QTLs were identified in SDr on chromosomes: 1A, 2A, 5A, 2B, 3B, 4B, 5B, 6B, 7B, 3D, 5D and 6D. Most of the QTLs for GP and early leaf growth parameters were clustered on chromosome 4B (associated with the Rht-B1 marker) both in C and SDr plants. The results indicate the complex and polygenic nature of germination.

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“…For example, selfing and asexual reproduction may have been selected by early farmers because of reproductive assurance (Rick, 1988;Allard, 1999;Gepts, 2004). Likewise, changes in ploidy might have been favored because of effects on development or on fruit and seed size (Smartt and Simmonds, 1995;Villar and Veneklaas, 1998;Well and Fossey, 1998;Otto and Whitton, 2000).…”

Section: Reproductive Barrier Strength In Domesticated Speciesmentioning

confidence: 99%