Diversity, evolution, and function of stomata bearing structures in Cuscuta (dodders, Convolvulaceae): From extrafloral nectar secretion to transpiration in arid conditions

Clayson, Courtney; Ruiz, Ignacio García; Costea, Mihai

doi:10.1016/j.ppees.2014.08.004

Cited by 16 publications

(17 citation statements)

References 37 publications

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“…For quantification of jasmonic and salicylic acids (JA and SA), c . 100 mg of fresh mass of soybean leaves or C. australis exploratory stems (Clayson et al ., ) were ground in liquid nitrogen and 1 ml of ethyl acetate spiked with the internal standards (20 ng of D 4 ‐SA and 100 ng of D 5 ‐JA) was added to each sample (five biological replicates). After a 10 min vortexing step, followed by centrifugation at 13 000 g for 15 min at 4°C, the supernatants were evaporated to dryness in a vacuum concentrator (Eppendorf) at 30°C.…”

Section: Methodsmentioning

confidence: 99%

Aphid (Myzus persicae) feeding on the parasitic plant dodder (Cuscuta australis) activates defense responses in both the parasite and soybean host

Song

et al. 2018

New Phytologist

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Dodders (Cuscuta spp.) are shoot holoparasites, whose haustoria penetrate host tissues to enable fusion between the parasite and host vascular systems, allowing Cuscuta to extract water, nutrients and other molecules from hosts. Aphids are piercing-sucking herbivores that use specialized stylets to feed on phloem sap. Aphids are known to feed on Cuscuta, but how Cuscuta and its host plant respond to aphids attacking the parasite was unknown. Phytohormone quantification, transcriptomic analysis and bioassays were performed to determine the responses of Cuscuta australis and its soybean (Glycine max) hosts to the feeding of green peach aphid (GPA; Myzus persicae) on C. australis. Decreased salicylic acid levels and 172 differentially expressed genes (DEGs) were found in GPA-attacked C. australis, and the soybean hosts exhibited increased jasmonic acid contents and 1015 DEGs, including > 100 transcription factor genes. Importantly, GPA feeding on C. australis increased the resistance of the soybean host to subsequent feeding by the leafworm Spodoptera litura and soybean aphid Aphis glycines, resulting in 21% decreased leafworm mass and 41% reduced aphid survival rate. These data strongly suggest that GPA feeding on Cuscuta induces a systemic signal, which is translocated to hosts and activates defense against herbivores.

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Section: Methodsmentioning

confidence: 99%

Aphid (Myzus persicae) feeding on the parasitic plant dodder (Cuscuta australis) activates defense responses in both the parasite and soybean host

Song

et al. 2018

New Phytologist

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“…Considering the desert habit these species occur in [55,95], it is most likely that this peculiar embryo has evolved as a storage organ. Less is known about the natural history of C. microstyla (section Subulatae), but this species also grows in arid habitats in the Andes [55,96].…”

Section: Plos Onementioning

confidence: 99%

Cuscuta seeds: Diversity and evolution, value for systematics/identification and exploration of allometric relationships

et al. 2020

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Cuscuta (dodders) is a group of parasitic plants with tremendous economic and ecological significance. Their seeds are often described as "simple" or "unspecialized" because they do not exhibit any classical dispersal syndrome traits. Previous studies of seed morphology and/or anatomy were conducted on relatively few species. We expanded research to 101 species; reconstructed ancestral character states; investigated correlations among seed characters and explored allometric relationships with breeding systems, the size of geographical distribution of species in North America, as well as the survival of seedlings. Seed morphological and anatomical characters permit the separation of subgenera, but not of sections. Identification of Cuscuta species using seed characteristics is difficult but not impossible if their geographical origin is known. Seeds of subg. Monogynella species, exhibit the likely ancestral epidermis type consisting of elongated and interlocked cells, which are morphologically invariant, uninfluenced by dryness/wetness. Subgenera Cuscuta, Pachystigma and Grammica have evolved a seed epidermis with isodiametric cells that can alternate their morphology between two states: pitted when seeds are dry, and papillose after seed imbibition. A seed coat with double palisade architecture throughout the entire seed has also apparently evolved in subgenera Cuscuta, Pachystigma and Grammica, but several species in two clades of the latter subgenus reverted to a single palisade layer outside the hilum area. The same latter species also evolved a peculiar, globose embryo, likely having a storage role, in contrast to the ancestral filiform and coiled embryo present throughout the remainder of the genus. Autogamous species had on average the highest number of seeds per capsule, whereas fully xenogamous taxa had the lowest. No correlation was revealed between the size of the seeds and the size of their geographical distribution in North America, but seedlings of species with larger seeds survived significantly longer than seedlings resulted from smaller seeds. Diversity and evolution of seed traits was discussed in relationship with their putative roles in dormancy, germination and dispersal.

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“…Stomatiferous structures have been recently documented in many Cuscuta species (reviewed by Clayson et al 2014 ); however, their presence at the apex of the ovary and base of styles in C. mantiqueirana is a novel feature. Stomatiferous (multicellular) protuberances ( SPs ) develop during anthesis on the haustorial stems of species in subgenus Grammica , as well as on the calyx and corolla of flowers in species from multiple clades of subgenera Cuscuta and Grammica ( Clayson et al 2014 ). When present on the calyx and corolla, SPs are diversely shaped (e.g., tubular, hemispherical, conical, crests) and have evolutionary and taxonomic significance ( Costea and Stefanović 2010 ; Costea et al 2011a , 2011b , 2013 ).…”

Section: Discussionmentioning

confidence: 99%

“…When present on the calyx and corolla, SPs are diversely shaped (e.g., tubular, hemispherical, conical, crests) and have evolutionary and taxonomic significance ( Costea and Stefanović 2010 ; Costea et al 2011a , 2011b , 2013 ). SPs on the flowers are characteristic of species that have evolved in areas with a marked dry season ( Clayson et al 2014 ). The water loss through the SPs stimulates the hosts to absorb more water by increasing the negative pressure/tension in the xylem of the host, via the haustoria connection ( Clayson et al 2014 ).…”

Section: Discussionmentioning

confidence: 99%

Notes on the systematics of Cuscuta sect. Subulatae (subg. Grammica) with the description of Cuscuta mantiqueirana, a new species from Brazil

Costea¹,

Silva²,

Simão-Bianchini³

et al. 2021

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Cuscuta mantiqueirana Costea, S.S. Silva & Sim.-Bianch. a new species from montane cloud forests of the Serra da Mantiqueira, Brazil, is described and illustrated. The morphological and phylogenetic analyses revealed that the new species belongs to sect. Subulatae of subg. Grammica. The new species is related to C. odorata var. botryoides, C. rotundiflora and C. globiflora from which it differs in narrower calyx lobes and the presence of four stomatiferous lobes or projections at the distal part of the ovary. A detailed morphological comparison with C. odorata var. botryoides, morphologically the most similar taxon, is provided along with the geographical distribution, ecology and host range of the species. The morphological and phylogenetic relationships of the new species, as well as the diversity of stomatiferous projections, are discussed in the broader context of sect. Subulatae and subg. Grammica. Cuscuta boliviana var. paranensis is considered a synonym of C. odorata var. botryoides.

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Diversity, evolution, and function of stomata bearing structures in Cuscuta (dodders, Convolvulaceae): From extrafloral nectar secretion to transpiration in arid conditions

Cited by 16 publications

References 37 publications

Aphid (Myzus persicae) feeding on the parasitic plant dodder (Cuscuta australis) activates defense responses in both the parasite and soybean host

Aphid (Myzus persicae) feeding on the parasitic plant dodder (Cuscuta australis) activates defense responses in both the parasite and soybean host

Cuscuta seeds: Diversity and evolution, value for systematics/identification and exploration of allometric relationships

Notes on the systematics of Cuscuta sect. Subulatae (subg. Grammica) with the description of Cuscuta mantiqueirana, a new species from Brazil

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