Growing with siblings: a common ground for cooperation or for fiercer competition among plants?

Milla, Rubén; Forero, Diana Maria Gonzalez; Escudero, Adrián; Iriondo, José María

doi:10.1098/rspb.2009.0369

Cited by 68 publications

(84 citation statements)

References 60 publications

(84 reference statements)

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“…However, recent studies have shown that the competition between plants is more complicated than previously thought (Chu et al 2008;Milla et al 2009). Dudley and File (2007) demonstrate that Cakile edentula increases allocation to roots to increase competition when two individuals are strangers (from different mother plants of the same species), but not when they are siblings (from the same mother plants).…”

Section: Introductionmentioning

confidence: 96%

“…Initially, many studies have measured effects of growing with siblings or strangers on fitness (Cheplick and Kane 2004;Milla et al 2009) to understand mechanisms of kin selection and resource partitioning. Subsequently, some studies have investigated effects of growth with siblings or strangers on morphological and allocation traits (Dudley and File 2007;Murphy and Dudley 2009;.…”

Section: Introductionmentioning

confidence: 99%

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Kin selection or resource partitioning for growing with siblings: implications from measurements of nitrogen uptake

et al. 2015

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Aims Kin selection and resource partitioning have been proposed to explain interactions between plants growing with siblings (from the same mother). These mechanisms have been examined by measurements of fitness, phenotype or allocation traits, but have seldom been tested with N acquisition traits. Methods We determine if kin selection and resource partitioning are occurring using two annual species (Sorghum vulgare and Glycine max) with a short-term 15 N experiment. A mixture of ammonium, nitrate and glycine (1:1:1) was injected into soils around plants after they grew for 47 days. Only one nitrogen (N) form was 15 N labeled in each labeling solution. Results S. vulgare increased root allocation when growing with strangers (from the different mother), but not increase their N uptake. Although G. max strangers did not increase their root allocation, they significantly increased uptake of total N and the most abundant N form (nitrate) and decreased uptake of the least abundant (glycine). Conclusions G. max siblings reduced competition due to chemical resource partitioning while S. vulgare showed kin selection. We concluded that processes related to kin selection and resource partitioning can occur simultaneously, resulting in different competitive ability. These findings can improve our understanding of plants growing with siblings or strangers.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Kin selection or resource partitioning for growing with siblings: implications from measurements of nitrogen uptake

et al. 2015

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“…The most notable feature of these performance comparisons in plants is the variation in results, with positive, negative, and no fitness benefits to growing with siblings compared with strangers (reviewed in Milla et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Kin recognition, not competitive interactions, predicts root allocation in young Cakile edentula seedling pairs

2010

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Summary• Recent studies have demonstrated sibling vs stranger differences in group root allocation in plants, suggesting that plants have the potential for kin discrimination in competition. However, morphology differences could potentially be generated by competition-based mechanisms. Here, we tested these hypotheses for the sibling vs stranger differences in root allocation in Cakile edentula.• Seeds were planted in pairs of either kin (siblings) or strangers, from all combinations of eight families, to give eight kin (sibling) and 28 stranger pair identities. Because the species has a seed dimorphism, the 10 replicates of each pair identity included both seed types. Root allocation, size inequality between seedlings in a pair, and competitive ability were derived from measures of biomass and height.• Cakile edentula seedlings demonstrated the same kin recognition response previously observed in juvenile plants, with lower root allocation in kin pairs than stranger pairs. The seed dimorphism was not associated with root allocation.• The two competitive mechanisms, genetic differences in competitive ability and increased size inequality in stranger groups, did not explain the root allocation differences in these seedlings. Kin recognition offered the most probable explanation for the differences in root allocation between sibling and stranger pairs.

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“…This idea plays a key role in hypotheses for the evolution of sex [3,4] and outcrossing [5] and has received some support in plant ecology (e.g. [6][7][8] and references therein).…”

Section: Introductionmentioning

confidence: 99%

Evidence for competition and cooperation among climbing plants

Biernaskie

2010

Proc. R. Soc. B.

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A plant's best strategy for acquiring resources may often depend on the identity of neighbours. Here, I ask whether plants adjust their strategy to local relatedness: individuals may cooperate (reduce competitiveness) with kin but compete relatively intensely with non-kin. In a greenhouse experiment with Ipomoea hederacea, neighbouring siblings from the same inbred line were relatively uniform in height; groups of mixed lines, however, were increasingly variable as their mean height increased. The reproductive yield of mixed and sibling groups was similar overall, but when adjusted to a common mean height and height inequality, the yield of mixed groups was significantly less. Where this difference in yield was most pronounced (among groups that varied most in height), mixed groups tended to allocate more mass to roots than comparable sibling groups, and overall, mixed groups produced significantly fewer seeds per unit mass of roots. These results suggest that, from the group perspective, non-kin may have wasted resources in below-ground competition at the expense of reproduction; kin groups, on the other hand, displayed the relative efficiency that is expected of reduced competitiveness.

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Growing with siblings: a common ground for cooperation or for fiercer competition among plants?

Cited by 68 publications

References 60 publications

Kin selection or resource partitioning for growing with siblings: implications from measurements of nitrogen uptake

Kin selection or resource partitioning for growing with siblings: implications from measurements of nitrogen uptake

Kin recognition, not competitive interactions, predicts root allocation in young Cakile edentula seedling pairs

Evidence for competition and cooperation among climbing plants

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