Phylogenetically informative pollen structures of ‘caesalpinioid’ pollen (Caesalpinioideae, Cercidoideae, Detarioideae, Dialioideae and Duparquetioideae: Fabaceae)

Banks, Hannah; Lewis, Gwilym P.

doi:10.1093/botlinnean/boy005

Cited by 14 publications

(13 citation statements)

References 25 publications

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“…Banks & al. (, ) also noted the unique structure of the Piliostigma pollen, in particular the presence of a spiny operculum, which occurs in no other Cercidoideae (Banks & Lewis, ). Other authors have considered Piliostigma as a section of Bauhinia , rather than as a separate genus (Bentham, ; Wunderlin & al., ; Zhang, ; Hao & al., ), noting that other dioecious species occur within Bauhinia ( B .…”

Section: Discussionmentioning

confidence: 98%

Testing generic limits in Cercidoideae (Leguminosae): Insights from plastid and duplicated nuclear gene sequences

Sinou

Cardinal‐McTeague

Bruneau

2020

TAXON

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Reconstructing the phylogenetic history of species in large taxonomic groups remains a challenge despite ever increasing access to molecular data. In subfamily Cercidoideae (Leguminosae), the large pantropical Bauhinia s.l. (~380 spp.) is never supported as monophyletic, but the generic boundaries and the number of genera that should be recognised remains a challenging taxonomic and phylogenetic question. Here we reconstruct the phylogeny of Bauhinia s.l. and related genera in the subfamily using sequences obtained from five loci (matK, trnL-F, Leafy, and two previously undetected duplicate copies of Legcyc), which we analyse individually and in a concatenated matrix (excluding Leafy). The individual and concatenated analyses generally support two distinct lineages in Bauhinia s.l.: (1) the Bauhinia clade, containing Bauhinia s.str., Brenierea, and Piliostigma; and (2) the Phanera clade, containing Barklya, Cheniella, Gigasiphon, Lasiobema, Lysiphyllum, Phanera s.str., Schnella, and Tylosema. Based on our analyses, we recognise 14 genera in Cercidoideae. We resurrect the genus Tournaya from Gigasiphon, and synonymise the Asian segregate genus Lasiobema back into Phanera s.str. Our analyses reveal a clear gene duplication event in CYCLOIDEA that is shared by all Cercidoideae excluding the sister lineage to the subfamily, Cercis, supporting recent hypotheses for a whole genome duplication in all Cercidoideae except this genus.

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Section: Discussionmentioning

confidence: 98%

Testing generic limits in Cercidoideae (Leguminosae): Insights from plastid and duplicated nuclear gene sequences

Sinou

Cardinal‐McTeague

Bruneau

2020

TAXON

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“…Critical identification was made by x1,000 magnification based on standard literature (Bonnefille & Riollet, 1980;Gosling, Miller, & Livingstone, 2013;Leźine, 2005;Schüler & Hemp, 2016;Scott, 1982), taxonomical studies (Banks & Lewis, 2018;Poston & Nowicke, 1993), and online pollen catalogues (Bremond, 2011). Critical identification was made by x1,000 magnification based on standard literature (Bonnefille & Riollet, 1980;Gosling, Miller, & Livingstone, 2013;Leźine, 2005;Schüler & Hemp, 2016;Scott, 1982), taxonomical studies (Banks & Lewis, 2018;Poston & Nowicke, 1993), and online pollen catalogues (Bremond, 2011).…”

Section: Pollen and Palynomorph Analysismentioning

confidence: 99%

“…At least 400 pollen grains were counted per sample using a microscope of x400 magnification. Critical identification was made by x1,000 magnification based on standard literature (Bonnefille & Riollet, 1980;Gosling, Miller, & Livingstone, 2013;Leźine, 2005;Schüler & Hemp, 2016;Scott, 1982), taxonomical studies (Banks & Lewis, 2018;Poston & Nowicke, 1993), and online pollen catalogues (Bremond, 2011). We differentiate the Acacia type into Vachellia and Senegalia by means of columella identification (Kyalangalilwa, Boatwright, Daru, Maurin, & van der Bank, 2013).…”

Section: Pollen and Palynomorph Analysismentioning

confidence: 99%

Vegetation state changes in the course of shrub encroachment in an African savanna since about 1850 CE and their potential drivers

Tabares

Zimmermann

Dietze

et al. 2019

Ecology and Evolution

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1. Shrub encroachment has far-reaching ecological and economic consequences in many ecosystems worldwide. Yet, compositional changes associated with shrub encroachment are often overlooked despite having important effects on ecosystem functioning.2. We document the compositional change and potential drivers for a northern Namibian Combretum woodland transitioning into a Terminalia shrubland. We use a multiproxy record (pollen, sedimentary ancient DNA, biomarkers, compoundspecific carbon (δ 13 C) and deuterium (δD) isotopes, bulk carbon isotopes (δ 13 Corg), grain size, geochemical properties) from Lake Otjikoto at high taxonomical and temporal resolution.3. We provide evidence that state changes in semiarid environments may occur on a scale of one century and that transitions between stable states can span around 80 years and are characterized by a unique vegetation composition. We demonstrate that the current grass/woody ratio is exceptional for the last 170 years, as supported by n-alkane distributions and the δ 13 C and δ 13 Corg records. Comparing vegetation records to environmental proxy data and census data, we infer a complex network of global and local drivers of vegetation change. While our δD record suggests physiological adaptations of woody species to higher atmospheric pCO 2 concentration and drought, our vegetation records reflect the impact of broadscale logging for the mining industry, and the macrocharcoal record suggests a decrease in fire activity associated with the intensification of farming. Impact of selective grazing is reflected by changes in abundance and taxonomical composition of grasses and by an increase of nonpalatable and trampling-resistant taxa.In addition, grain-size and spore records suggest changes in the erodibility of soils because of reduced grass cover. | 963TABARES ET Al.

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“…Present investigation revealed that S. formosa pollen is of tricolporate type, indicated by the presence of 3 pores on each pollen grain. Tricolporate pollen is common in Papilionoideae (Avci et al, 2013;Banks and Lewis, 2018).…”

Section: Pollen Viability Assessmentmentioning

confidence: 99%

Pollen viability and stigma receptivity in Swainsona formosa (G.Don) J.Thompson (Fabaceae), an ornamental legume native to Australia

Ichwan

Eliyanti

Swari

2019

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Pollen viability and stigma receptivity are prerequisites for successful cross-pollination and seed set in Swainsona formosa. In this study, the pollen viabilities and stigma receptivities was assayed by in vitro pollen germination and simple hand-pollination method on glasshouse-grown plants, respectively. The viability of pollen grains was tested under three different storage conditions: 1) pollen grains were left on the plant in the glasshouse under natural conditions, 2) pollen grains were harvested and kept at a low temperature (4 o C) in total darkness, and 3) pollen grains were kept in a dry freezer (-10 o C) and in total darkness. Meanwhile, stigma receptivity was determined by hand-pollination using fresh pollen grains on flower of glasshouse-grown plants at one day before anther dehiscence up to 8 days after anther dehiscence. The results showed that pollen grains could be stored at 4 o C for up to 28 days without significantly losing their viability. Pollen longevity could be extended beyond two months when stored at -10 o C and under dry conditions. These findings provided a simple and economically sound method for storage of S. formosa pollen. In addition, stigma receptivity was found to be receptive from one day before anther dehiscence and reached its peak within four days after anther dehiscence. These results provide a valuable background to the conventional breeding of this species to create hybrids through cross-pollination

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Phylogenetically informative pollen structures of ‘caesalpinioid’ pollen (Caesalpinioideae, Cercidoideae, Detarioideae, Dialioideae and Duparquetioideae: Fabaceae)

Cited by 14 publications

References 25 publications

Testing generic limits in Cercidoideae (Leguminosae): Insights from plastid and duplicated nuclear gene sequences

Testing generic limits in Cercidoideae (Leguminosae): Insights from plastid and duplicated nuclear gene sequences

Vegetation state changes in the course of shrub encroachment in an African savanna since about 1850 CE and their potential drivers

Pollen viability and stigma receptivity in Swainsona formosa (G.Don) J.Thompson (Fabaceae), an ornamental legume native to Australia

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