The Evolution of Placentation in Flowering Plants: A Possible Role for Kin Selection

Shivaprakash, K. Nagaraju; Bawa, Kamaljit S.

doi:10.3389/fevo.2022.784077

Cited by 7 publications

(3 citation statements)

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“…Flowering time is key to a plant reproductive strategy, and reproductive success depends on the flowering behavior of immediate conspecific neighbors [ 24 , 40 , 41 ]. Kin selection plays a role in the evolution of placentation and reproductive traits in flowering plants [ 42 , 43 ]. In particular, early flowering plants are favored by phenotypic selection on flowering phenology [ 44 ].…”

Section: Discussionmentioning

confidence: 99%

Kin Recognition in an Herbicide-Resistant Barnyardgrass (Echinochloa crus-galli L.) Biotype

Ding

Zhao

et al. 2023

Plants

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Despite increasing evidence of kin recognition in natural and crop plants, there is a lack of knowledge of kin recognition in herbicide-resistant weeds that are escalating in cropping systems. Here, we identified a penoxsulam-resistant barnyardgrass biotype with the ability for kin recognition from two biotypes of penoxsulam-susceptible barnyardgrass and normal barnyardgrass at different levels of relatedness. When grown with closely related penoxsulam-susceptible barnyardgrass, penoxsulam-resistant barnyardgrass reduced root growth and distribution, lowering belowground competition, and advanced flowering and increased seed production, enhancing reproductive effectiveness. However, such kin recognition responses were not occurred in the presence of distantly related normal barnyardgrass. Root segregation, soil activated carbon amendment, and root exudates incubation indicated chemically-mediated kin recognition among barnyardgrass biotypes. Interestingly, penoxsulam-resistant barnyardgrass significantly reduced a putative signaling (–)-loliolide production in the presence of closely related biotype but increased production when growing with distantly related biotype and more distantly related interspecific allelopathic rice cultivar. Importantly, genetically identical penoxsulam-resistant and -susceptible barnyardgrass biotypes synergistically interact to influence the action of allelopathic rice cultivar. Therefore, kin recognition in plants could also occur at the herbicide-resistant barnyardgrass biotype level, and intraspecific kin recognition may facilitate cooperation between genetically related biotypes to compete with interspecific rice, offering many potential implications and applications in paddy systems.

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Section: Discussionmentioning

confidence: 99%

Kin Recognition in an Herbicide-Resistant Barnyardgrass (Echinochloa crus-galli L.) Biotype

Ding

Zhao

et al. 2023

Plants

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“…Placentation in studied rosid families is mostly axile, less often parietal, and probably equally distributed among fabid and malvid clades (Takhtajan, 2009;IckertBond et al, 2014;Shivaprakash & Bawa, 2022). In many cases, the gynoecium is syncarpous, multi-locular (2-5-locular), with as many locules as carpels, and has combined placentation (axile beneath, parietal above) or parietal placentation with protruding septas contacting in the ovary center.…”

Section: Discussionmentioning

confidence: 99%

“…Molecular insight led to the revision of phylogeny of this group, reevaluation of many phenotypic features and re-examination of previously accepted evolutionary-morphological concepts. Molecular phylogenetics also resulted in search of missing synapomorphies, especially in the reproductive morphology, for this pivotal group and its sub-clades (Endress & Friis, 2006;Endress & Matthews, 2006;2012;Schönenberger & von Balthazar, 2006;Endress, 2014;Ickert Bond et al, 2014;Shivaprakash & Bawa, 2022).…”

Section: Introductionmentioning

confidence: 99%

Morphological and taxonomical treatments of fruits in the subclass Rosidae Takht. of the flora of Ukraine

Odintsova¹

2023

Biol. Stud.

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Introduction. Rosids is the pivotal clade of eudicots, whose taxonomic composition was significantly changed based on molecular phylogeny. Molecular insight led to the re-evaluation of many phenotypic features, especially in reproductive morphology. Although the floral structure and evolution within the current scope of rosids were actively investigated, the morphological structure of fruit was almost fully neglected. The present study aimed to survey the morphological diversity of fruits in rosids (subclass Rosidae) in the flora of Ukraine to reveal the most common fruit types, analyze the distribution of the basic fruit types among rosids, and survey some comparative-morphological features of gynoecium and fruit. Materials and Methods. Fruit features have been surveyed based on many carpological sources. We also analyzed the gynoecium characteristics crucial for fruit development, i.e., the type of ovary insertion, placentation, and ovule and locule number. For Rosidae, seven basic fruit types were recognized using the approach previously elaborated for the monocot plants of Ukraine: aggregate fruit, multi-seeded monocarp, capsule, berry, multi-seeded pyrenarium, schizocarp, and one-seeded fruit. Results. As a result, the annotated list of morphological characteristics for each of the 54 families of Rosidae occurring in Ukraine was composed. In this list, the complementary and the most contrasting definitions of fruits from different sources were combined. Discussion. According to our calculations, the subclass Rosidae in the flora of Ukraine is represented by 326 genera and at least 1617 species. Our results demonstrated that the most widespread fruit types at the family level seem to be capsular and one-seeded fruits, while at genus and species level the portion of multi-seeded monocarps and aggregate fruits is also significant. Nine families reveal more than one basic fruit type in the flora of Ukraine. Some fruits are ambiguously classified into one or another fruit type because of their intermediate features. Thus, fuzzy boundaries between most fruit types are evident. Conclusions. The obtained results have been compared with our previously reported results for the monocot clade in the flora of Ukraine. In both cases, the predominance of capsular fruits at the family-level spectrum of basic fruit types was clearly demonstrated. The results of our analysis suggest that the model of basic fruit types has the potential to be applied to the formal treatment of fruit structure in other groups of angiosperms.

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The role of sexual selection in flowering plant origin and evolution and the potential significance of female competition and selection in ovules

Bachelier

2022

Botanical Journal of the Linnean Society

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Ever since Erasmus and Charles Darwin laid down the foundations of the concept, sexual selection has largely been regarded as a matter of male competition and female selection. While their role in plant evolution and the elusive origin of flowering plants has largely been neglected in contrast to the situation with animals, there is a growing body of evidence accumulated over the past 50 years supporting the hypothesis that, together with the flower and the carpel, increased pollination has led to an intensification of the competition between the fittest (and faster) pollen tubes and their selection by the surrounding maternal tissue. In contrast, the potential role of female competition was historically seldom considered but started to re-emerge a decade ago in both animal and plant evolution. Here, I review a large body of the vast embryological literature to re-evaluate unusual developmental traits in the plant female germline, traditionally considered as teratological occurrences of mere systematic interest, in the light of the current phylogenetic framework for flowering plants. After a summary of the basic tenets of sexual selection and the role of male competition and maternal selection in shaping plant evolution and diversity, I show how recent insights into the deepest nodes of flowering plant phylogeny and confirmation of their systematic relationships over the past 30 years have led to major shifts in our understanding of the reproductive biology of their most recent common ancestor. I also show that a re-evaluation of these unusual developmental traits in the female germline, especially in early-diverging lineages of flowering plants, may potentially be correlated with some floral structural traits. On the basis of these results, I argue that there is circumstantial evidence for mechanisms of female intrasexual competition and selection in individual ovules of flowering plants that are similar to those between pollen tubes competing inside the carpel. I also argue that although they may have evolved independently multiple times in unrelated lineages, they could also be the ‘burning embers’ of plesiomorphic traits that would have been largely selected against after the evolution of their most recent common ancestor.

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The Evolution of Placentation in Flowering Plants: A Possible Role for Kin Selection

Cited by 7 publications

References 62 publications

Kin Recognition in an Herbicide-Resistant Barnyardgrass (Echinochloa crus-galli L.) Biotype

Kin Recognition in an Herbicide-Resistant Barnyardgrass (Echinochloa crus-galli L.) Biotype

Morphological and taxonomical treatments of fruits in the subclass Rosidae Takht. of the flora of Ukraine

The role of sexual selection in flowering plant origin and evolution and the potential significance of female competition and selection in ovules

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