Pollen performance decreases with plant age for outcrosser but not selfer: evidence for cost of male performance

Malagon, Daniel A.; Roche, Morgan D.; McElderry, Robert M.; Kalisz, Susan

doi:10.1002/ajb2.1346

Cited by 4 publications

(5 citation statements)

References 66 publications

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“…Moreover, there is an abundance of existing ecological and phenotypic data on Collinsia species related to niche breadth ( Randle et al 2009 ; Grant and Kalisz 2020 ), sexual interference, sexual conflict, and pollen traits ( e.g. , Lankinen and Madjidian 2011 ; Lankinen et al 2016 ; Lankinen and Strandh 2019 ; Malagon et al 2019 ; Madjidian et al 2020 ), pollination biology ( e.g. , Elle and Carney 2003 ; Kalisz and Vogler 2003 ; Kalisz et al 2004 ; Randle et al 2018 ), phenotypic plasticity ( Jorgensen and Arathi 2013 ; Spigler and Kalisz 2013 ), population differentiation ( Hazzouri et al .…”

Section: Discussionmentioning

confidence: 99%

New genomic resources and comparative analyses reveal differences in floral gene expression in selfing and outcrossing Collinsia sister species

Frazee

Rifkin

Maheepala

et al. 2021

G3 Genes|Genomes|Genetics

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The evolutionary transition from outcross-fertilization to self-fertilization is one of the most common in angiosperms and is often associated with a parallel shift in floral morphological and developmental traits, such as reduced flower size and pollen to ovule ratios, known as the ‘selfing syndrome’. How these convergent phenotypes arise, the extent to which they are shaped by selection, and the nature of their underlying genetic basis are unsettled questions in evolutionary biology. The genus Collinsia (Plantaginaceae) includes seven independent transitions from outcrossing or mixed mating to high selfing rates accompanied by selfing syndrome traits. Accordingly, Collinsia represents an ideal system for investigating this parallelism, but requires genomic resource development. We present a high quality de novo genome assembly for the highly selfing species C. rattanii. To begin addressing the basis of selfing syndrome developmental shifts, we evaluate and contrast patterns of gene expression from floral transcriptomes across three stages of bud development for C. rattanii and its outcrossing sister species C. linearis. Relative to C. linearis, total gene expression is less variable among individuals and bud stages in C. rattanii. In addition, there is a common pattern among differentially expressed genes: lower expression levels that are more constant across bud development in C. rattanii relative to C. linearis. Transcriptional regulation of enzymes involved in pollen formation specifically in early bud development may influence floral traits that distinguish selfing and outcrossing Collinsia species through pleiotropic functions. Future work will include additional Collinsia outcrossing-selfing species pairs to identify genomic signatures of parallel evolution.

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Section: Discussionmentioning

confidence: 99%

New genomic resources and comparative analyses reveal differences in floral gene expression in selfing and outcrossing Collinsia sister species

Frazee

Rifkin

Maheepala

et al. 2021

G3 Genes|Genomes|Genetics

Self Cite

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show abstract

“…2d). Also under the two-sex model, the pattern of pollination used is often described as a type of "mating system" (Willson and Burley 1983;Etterson and Mazer 2016;Lankinen et al 2016;Malagon et al 2019), and sporophytes are said to engage in "mating." Thus "mating" is apparently redefined so as not to require the ability to make gametes, which is different from how the term is used for animals (Table 1).…”

Section: Heterosporous Plants: the Two-sex Modelmentioning

confidence: 99%

“…2 d). Also under the two-sex model, the pattern of pollination used is often described as a type of “mating system” (Willson and Burley 1983 ; Etterson and Mazer 2016 ; Lankinen et al 2016 ; Malagon et al 2019 ), and sporophytes are said to engage in “mating.” Thus “mating” is apparently redefined so as not to require the ability to make gametes, which is different from how the term is used for animals (Table 1 ). Furthermore, the process of pollination is often regarded as being a part of “fertilization,” thus extending the concept of “fertilization” to include events from pollination through actual zygote formation (Till-Bottraud et al 2005 ; Castilla et al 2016 ; Taiz and Taiz 2017 ) (Table 1 ).…”

Section: On Pollinationmentioning

confidence: 99%

Plant sexual reproduction: perhaps the current plant two-sex model should be replaced with three- and four-sex models?

Meissner

2021

Plant Reprod

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The two-sex model makes the assumption that there are only two sexual reproductive states: male and female. However, in land plants (embryophytes) the application of this model to the alternation of generations life cycle requires the subtle redefinition of several common terms related to sexual reproduction, which seems to obscure aspects of one or the other plant generation: For instance, the homosporous sporophytic plant is treated as being asexual, and the gametophytes of angiosperms treated like mere gametes. In contrast, the proposal is made that the sporophytes of homosporous plants are indeed sexual reproductive organisms, as are the gametophytes of heterosporous plants. This view requires the expansion of the number of sexual reproductive states we accept for these plant species; therefore, a three-sex model for homosporous plants and a four-sex model for heterosporous plants are described and then contrasted with the current two-sex model. These new models allow the use of sexual reproductive terms in a manner largely similar to that seen in animals, and may better accommodate the plant alternation of generations life cycle than does the current plant two-sex model. These new models may also help stimulate new lines of research, and examples of how they might alter our view of events in the flower, and may lead to new questions about sexual determination and differentiation, are presented. Thus it is suggested that land plant species have more than merely two sexual reproductive states and that recognition of this may promote our study and understanding of them.

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“…The new "male function" is often described as the production of pollen, while the "female function" is the production of ovules, or seeds, or fruits, and typically both of these redefined functions are attributed to the sporophytic individuals (Carr, 2013;Carper et al, 2016;Harth et al, 2016;Kamath et al, 2017;Christopher et al, 2019). Also under the two-sex model, pollination is often described as a "mating system" (Willson and Burley, 1983;Etterson and Mazer, 2016;Lankinen et al, 2016;Malagon et al, 2019), even though it seems unlikely for a sexually immature microgametophyte to "mate" with the tissues of a sporophyte which itself never makes gametes. Thus, under the two-sex model, "mating" no longer requires the involvement of just gamete-forming individuals, nor does it have to lead to the immediate production of a zygote.…”

Section: Fertilizationmentioning

confidence: 99%

Plant Sexual Reproduction: Perhaps the current plant two-sex model should be replaced with three- and four-sex models?

Meissner

2020

Preprint

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The current plant two-sex model makes the assumption that there are only two sexual reproductive states: male and female. However, the application of this model to the plant alternation of generations requires the subtle redefinition of several common terms related to sexual reproduction, which also seems to obscure aspects of one or the other plant generation: For instance, the homosporous sporophytic plant is treated as being “asexual,” and the gametophytes of angiosperms treated like mere gametes. In contrast, the proposal is made that the sporophytes of homosporous plants are indeed sexual reproductive organisms, as are the gametophytes of heterosporous plants. This view requires the expansion of the number of sexual reproductive states we accept for plants, therefore a three-sex model for homosporous plants and a four-sex model for heterosporous plants are described and then contrasted with the current two-sex model. These new models allow the use of sexual reproductive terms in a manner largely similar to that seen in animals, and may better accommodate the plant alternation of generations life cycle than does the current plant two-sex model. These new three-sex and four-sex models may also help stimulate new lines of research, and examples of how they might alter our view of the flower, and may lead to new perspectives in terms of sexual determination, are presented. Thus it is suggested that plants have more than merely two sexual reproductive states, and that recognition of this may promote our study and understanding of plants.

show abstract

Pollen performance decreases with plant age for outcrosser but not selfer: evidence for cost of male performance

Cited by 4 publications

References 66 publications

New genomic resources and comparative analyses reveal differences in floral gene expression in selfing and outcrossing Collinsia sister species

New genomic resources and comparative analyses reveal differences in floral gene expression in selfing and outcrossing Collinsia sister species

Plant sexual reproduction: perhaps the current plant two-sex model should be replaced with three- and four-sex models?

Plant Sexual Reproduction: Perhaps the current plant two-sex model should be replaced with three- and four-sex models?

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