Physiologically-Mediated Self/Non-Self Root Discrimination in<i>Trifolium repens</i>has Mixed Effects on Plant Performance

Falik, Omer; Kroon, Hans de; Novoplansky, Ariel

doi:10.4161/psb.1.3.2639

Cited by 49 publications

(45 citation statements)

References 32 publications

(37 reference statements)

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“…roots from the same plant) from those of another plant, even when the other plant is genetically identical (Falik et al. 2003; Falik, de Kroon & Novoplansky 2006). In fact, many of the ‘Tragedy of the Commons’ root studies discussed in the previous section have been reinterpreted as the plants showing self/non‐self discrimination.…”

Section: Influence Of Neighbours On Root Responsesmentioning

confidence: 99%

Root decisions

Hodge

2009

Plant Cell & Environment

257

199

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Root systems have recognizable developmental plans when grown in solution or agar; however, these plans often must be modified to cope with the prevailing conditions in the soil environment such as the avoidance of obstacles and the exploitation of nutrient-rich patches or water zones. The modular structure of roots enables them to respond to their environment, and roots are very adaptive at modifying growth throughout the root system to concentrate their efforts in the areas that are the most profitable. Roots also form associations with microorganisms as a strategy to enhance resource capture. However, while the responses of roots in nutrient patches are well-recognized, overall 'rules of response' and variation in strategy among plant species that can be applied in a number of different environments are still lacking. Finally, there is increasing evidence that root-root interactions are much more sophisticated than previously thought, and the evidence for roots to identify self from non-self roots will be briefly discussed.

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Section: Influence Of Neighbours On Root Responsesmentioning

confidence: 99%

Root decisions

Hodge

2009

Plant Cell & Environment

257

199

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“…Yet progress in areas such as root foraging mechanisms, or the interplay between facilitation and competition, shows that the processes involved in plant-plant competition are more complex than previously thought (Rajaniemi 2007;Chu et al 2008). An example of this is the renewed interest in the genetic determinants of intraspecific competition (for example, Falik et al 2006;Boyden et al 2008;Crutsinger et al 2008;Hughes et al 2008). In this context, a recent paper reported that plants of the annual Cakile edentula are able to identify kin in competitive settings and, more importantly, react by competing less aggressively against a close relative (Dudley & File 2007).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2009

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Recent work has shown that certain plants can identify their kin in competitive settings through root recognition, and react by decreasing root growth when competing with relatives. Although this may be a necessary step in kin selection, no clear associated improvement in individual or group fitness has been reported to qualify as such. We designed an experiment to address whether genetic relatedness between neighbouring plants affects individual or group fitness in artificial populations. Seeds of Lupinus angustifolius were sown in groups of siblings, groups of different genotypes from the same population and groups of genotypes from different populations. Both plants surrounded by siblings and by genotypes from the same population had lower individual fitness and produced fewer flowers and less vegetative biomass as a group. We conclude that genetic relatedness entails decreased individual and group fitness in L. angustifolius. This, together with earlier work, precludes the generalization that kin recognition may act as a widespread, major microevolutionary mechanism in plants.

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“…Root self-discrimination and its consequences for underground competition have been reported [7,9,10,34]. However, the role of self-discrimination in above-ground interactions has largely been ignored (but see [35] for the effect of kin discrimination on above-ground traits).…”

Section: Discussionmentioning

confidence: 99%

Self-discrimination in the tendrils of the vine Cayratia japonica is mediated by physiological connection

Fukano

Yamawo

2015

Proc. R. Soc. B.

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Although self-discrimination has been well documented, especially in animals, self-discrimination in plants has been identified in only a few cases, such as self-incompatibility in flowers and root discrimination. Here, we report a new form of self-discrimination in plants: discrimination by vine tendrils. We found that tendrils of the perennial vine Cayratia japonica were more likely to coil around neighbouring non-self plants than neighbouring self plants in both experimental and natural settings. The higher level of coiling around a physiologically severed self plant compared with that around a physiologically connected self plant suggested that self-discrimination was mediated by physiological coordination between the tendril and the touched plant as reported for self-discrimination in roots. The results highlight the importance of self-discrimination for plant competition not only underground, but also above-ground.

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Physiologically-Mediated Self/Non-Self Root Discrimination inTrifolium repenshas Mixed Effects on Plant Performance

Cited by 49 publications

References 32 publications

Root decisions

Root decisions

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

Self-discrimination in the tendrils of the vine Cayratia japonica is mediated by physiological connection

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