TY - JOUR
T1 - THE EFFECT OF POLYPLOIDY AND MATING SYSTEM ON FLORAL SIZE AND THE POLLINATION NICHE IN BRASSICACEAE
AU - Streher, Nathália Susin
AU - Budinsky, Trezalka
AU - Halabi, Keren
AU - Mayrose, Itay
AU - Ashman, Tia Lynn
N1 - Publisher Copyright:
© 2023 The University of Chicago. All rights reserved.
PY - 2024/1
Y1 - 2024/1
N2 - Premise of research. Polyploidy, a major evolutionary process in flowering plants, is expected to impact floral traits, which can have cascading effects on pollination interactions, but this may depend on selfing propensity. In a novel use of herbarium specimens, we assessed the effects of polyploidy and mating system on floral traits and the pol-lination niche of 40 Brassicaceae species. Methodology. We combined data on mating system (self-compatible or self-incompatible) with inferred ploidy level (polyploid or diploid) and used phylogenetically controlled analyses to investigate their influence on floral traits (size and shape) and the degree of pollination generalism based on the frequency and the richness of heterospecific pollen morphospecies captured by stigmas. Pivotal results. Flower size (but not shape) depended on the interaction between ploidy and mating system. Self-incompatible polyploid species had larger flowers than self-incompatible diploids, but there was no difference for self-compatible species. The breadth of pollination niche (degree of generalism) was not affected by ploidy but was rather strongly affected by mating system only. Self-incompatible species had more stigmas with heterospecific pollen and higher heterospecific pollen morphospecies richness per stigma than self-compatible species, regardless of their ploidy. Conclusions. Our results demonstrate that mating system moderated the influence of ploidy on morpholog-ical features associated with pollination generalism but that response in terms of heterospecific pollen captured as a proxy of pollination generalism was more variable.
AB - Premise of research. Polyploidy, a major evolutionary process in flowering plants, is expected to impact floral traits, which can have cascading effects on pollination interactions, but this may depend on selfing propensity. In a novel use of herbarium specimens, we assessed the effects of polyploidy and mating system on floral traits and the pol-lination niche of 40 Brassicaceae species. Methodology. We combined data on mating system (self-compatible or self-incompatible) with inferred ploidy level (polyploid or diploid) and used phylogenetically controlled analyses to investigate their influence on floral traits (size and shape) and the degree of pollination generalism based on the frequency and the richness of heterospecific pollen morphospecies captured by stigmas. Pivotal results. Flower size (but not shape) depended on the interaction between ploidy and mating system. Self-incompatible polyploid species had larger flowers than self-incompatible diploids, but there was no difference for self-compatible species. The breadth of pollination niche (degree of generalism) was not affected by ploidy but was rather strongly affected by mating system only. Self-incompatible species had more stigmas with heterospecific pollen and higher heterospecific pollen morphospecies richness per stigma than self-compatible species, regardless of their ploidy. Conclusions. Our results demonstrate that mating system moderated the influence of ploidy on morpholog-ical features associated with pollination generalism but that response in terms of heterospecific pollen captured as a proxy of pollination generalism was more variable.
KW - floral phenotype
KW - herbarium specimens
KW - heterospecific pollen
KW - pollination generalization
KW - self-incompatibility
KW - whole-genome duplication
UR - http://www.scopus.com/inward/record.url?scp=85185252186&partnerID=8YFLogxK
U2 - 10.1086/727826
DO - 10.1086/727826
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:85185252186
SN - 1058-5893
VL - 185
SP - 89
EP - 99
JO - International Journal of Plant Sciences
JF - International Journal of Plant Sciences
IS - 1
ER -