Hemiparasitism effect on Baccharis dracunculifolia DC. and consequences to its major galling herbivore

Bahia, Thaise de Oliveira; Zúñiga, Irene Gélvez; Souza, Matheus Lopes; Coutinho, Etiene Silva; Quesada, Maurício; Fernandes, Geraldo Wilson

doi:10.1590/0102-33062014abb0008

Cited by 6 publications

(9 citation statements)

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“…Taller plants with larger and more branched crowns are more likely to be used as perches and offer a greater number of sites for the establishment of S. flexicaulis [19, 20, 23]. Greater abundance of S. flexicaulis on individuals of B. dracunculifolia that presented larger classes of size and with more levels of branching were reported by [23]. In addition, plants with more complex architecture have branches with a greater variety of sizes, which can increase the amount of optimal substrates for the establishment of the hemiparasite.…”

Section: Discussionmentioning

confidence: 99%

“…Once the hemiparasitic plants are established, they can affect the host plant both directly and indirectly [21, 22, 23, 9] and, consequently, affect the structure of plant communities [14]. Directly, the hemiparasite decreases the growth and branching of the host plant [23], as they obtain water and nutrients directly from the xylem, decreasing the resources available for the metabolism of the host itself [11, 24, 25], which may ultimately lead to death [19, 26, 9]. Indirectly, the parasite can make the host plant more susceptible to attack by natural enemies [23] and to environmental stress [12, 11], which can also accelerate the death of the host.…”

Section: Introductionmentioning

confidence: 99%

“…Directly, the hemiparasite decreases the growth and branching of the host plant [23], as they obtain water and nutrients directly from the xylem, decreasing the resources available for the metabolism of the host itself [11, 24, 25], which may ultimately lead to death [19, 26, 9]. Indirectly, the parasite can make the host plant more susceptible to attack by natural enemies [23] and to environmental stress [12, 11], which can also accelerate the death of the host. Therefore, once the most abundant plant species in the environment are more frequently parasitized, the hemiparasitic plant can play an important role in the structuring of plant communities, since by promoting a higher mortality of individuals of dominant species, it would lead to greater uniformity in the number of individuals among plant species in the community [11, 27, 28, 29, 30, 31].…”

Section: Introductionmentioning

confidence: 99%

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The mistletoeStruthanthus flexicaulisreduces dominance and increases diversity of plants in campo rupestre

Monteiro

Barbosa

Antonini

et al. 2020

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24The interaction between hemiparasites and their host plants is an important structuring 25 mechanism for plant communities. The mistletoe Struthanthus flexicaulis (Loranthaceae) is 26 widely distributed in the campo rupestre ecosystem and likely has an important role in 27 structuring the communities of which its hosts are part. The main goals of this study were to 28 investigate the effects of parasitism by S. flexicaulis on host plants in a degraded area of 29 campo rupestre and to determine how parasitism affects characteristics of the structure of this 30 plant community over time. We found that parasitized plants had smaller crowns and branch 31 growth, and suffered lower mortality compared to non-parasitized plants. Parasitism by S. 32 flexicaulis decreased dominance and increased the diversity and evenness of plants in the 33 community over time. Parasitism leads to competition with the host for water and nutrients, 34 which may decrease the performance of the host and, consequently, leading to host death. 35The high mortality of the most abundant plant species led to a restructured woody plant 36 community. These results reinforce the importance of parasitic plants as key species for 37 maintaining species diversity in plant communities. 38 39 Chain 41 42 43 44 45 46 47 48 49 3 50 51 52 53 54 Identifying the factors that control the distribution, abundance and diversity of species 55 is important to understand the structuring of ecological communities. Communities are 56 structured according to climatic and historical variations (e.g. dispersion and speciation, 57 migration and extinction), local physical conditions and interactions among species [1, 2]. 58 On a local scale, abiotic factors have an important influence on the structuring of plant 59 communities, such as the availability of water and soil nutrients [34] in addition to 60 interactions with other organisms, such as microbes and arbuscular mycorrhizal fungi [5, 6, 61 7]. In turn, the distribution of plant communities strongly affects the community structure of 62 other organisms that directly depend on them as resources, such as herbivores and parasitic 63 plants [8, 9, 10]. 64 Among parasitic plants, hemiparasites are those capable of photosynthesis, but 65 depend on their hosts for water and nutrients [11]. The susceptibility to attack by 66 hemiparasitic plants (determined by chemical, physiological and physical processes at the 67 parasite-host interface) varies between plant species, and therefore, local abundance and the 68 degree of susceptibility of plants in a community are key factors for the successful 69 colonization of hemiparasites in the environment [12, 13, 14]. In addition, the seeds of the 70 hemiparasitic plants are mostly dispersed by birds, which can lead to a differential deposition 71 of seeds on the host plants according to the preferences of the birds for certain perches [15, 72 16, 17]. Generally, larger plants with more branched tops are more attractive perches for 4 73birds, leading to a greater abundance...

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The mistletoeStruthanthus flexicaulisreduces dominance and increases diversity of plants in campo rupestre

Monteiro

Barbosa

Antonini

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Once the hemiparasitic plants are established, they can affect the host plant both directly and indirectly [21,22,23,9] and, consequently, affect the structure of plant communities [14]. Directly, the hemiparasite decreases the growth and branching of the host plant [23], as they obtain water and nutrients directly from the xylem, decreasing the resources available for the metabolism of the host itself [11,24,25], which may ultimately lead to death [19,26,9]. Indirectly, the parasite can make the host plant more susceptible to attack by natural enemies [23] and to environmental stress [12,11], which can also accelerate the death of the host.…”

Section: Introductionmentioning

confidence: 99%

“…Directly, the hemiparasite decreases the growth and branching of the host plant [23], as they obtain water and nutrients directly from the xylem, decreasing the resources available for the metabolism of the host itself [11,24,25], which may ultimately lead to death [19,26,9]. Indirectly, the parasite can make the host plant more susceptible to attack by natural enemies [23] and to environmental stress [12,11], which can also accelerate the death of the host. Therefore, once the most abundant plant species in the environment are more frequently parasitized, the hemiparasitic plant can play an important role in the structuring of plant communities, since by promoting a higher mortality of individuals of dominant species, it would lead to greater uniformity in the number of individuals among plant species in the community [11,27,28,29,30,31].…”

Section: Introductionmentioning

confidence: 99%