2020
DOI: 10.1590/2447-536x.v26i1.2092
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Abstract: When propagated in vitro, explants receive all the nutrients needed for their growth, including carbohydrates, from the culture medium. However, it is not well understood how the type and concentration of carbohydrates can affect the functioning of the photosynthetic apparatus (particularly photosystem II) of these plants. The aim was to assess the morphophysiological responses of Billbergia zebrina plants in function of sources and concentrations of carbohydrates during in vitro culture. Side shoots of plants… Show more

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Cited by 16 publications
(9 citation statements)
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“…Embryo rescue is one of the most feasible techniques for propagation of species with propagation limitations, mainly due to seed dormancy, such as strelitzia (Strelitzia reginae Banks ex Aiton). For plants that exhibit chemical and physical dormancy of seeds, which affects germination rates (Gomes et al, 2003;Santos et al, 2003;Paiva et al, 2004;Martins et al, 2020, Santos et al, 2020, a zygotic embryo culture can be an effective method for plant propagation (Paiva et al, 2004;Paiva;Almeida, 2012). However, although germination was observed in tests conducted in vitro, there was no multiplication or formation of somatic embryos (Paiva et al, 2004).…”
Section: Introductionmentioning
confidence: 99%
“…Embryo rescue is one of the most feasible techniques for propagation of species with propagation limitations, mainly due to seed dormancy, such as strelitzia (Strelitzia reginae Banks ex Aiton). For plants that exhibit chemical and physical dormancy of seeds, which affects germination rates (Gomes et al, 2003;Santos et al, 2003;Paiva et al, 2004;Martins et al, 2020, Santos et al, 2020, a zygotic embryo culture can be an effective method for plant propagation (Paiva et al, 2004;Paiva;Almeida, 2012). However, although germination was observed in tests conducted in vitro, there was no multiplication or formation of somatic embryos (Paiva et al, 2004).…”
Section: Introductionmentioning
confidence: 99%
“…According to Zhang et al (2018), an increased value of V K can be considered a speci c marker of damage to the activity of the OEC from the electron donor side of PSII. In turn, alterations of the values of V J and V I indicate the functioning of electron transport between the quinones (Q A and Q B ) on the receptor side of PSII and changes in the e ciency/probability of movement of electrons between the photosystems, respectively (Santos et al 2020;Martins et al 2021). In this study, we observed that the presence of Si was associated with better electron transfer between the quinones and between PSII and PSI.…”
Section: Discussionmentioning
confidence: 48%
“…In this study, the rst stress-regulation mechanisms were related to the investment in the number of stomata (stomatal density and stomatal index) in the function of Cd concentrations. These adjustments in anatomy were re ected in a decrease of the transpiration rate and mass ow, diminishing the uptake and translocation of mineral elements present in the soil or culture medium to the aerial part (Pereira et al 2017;Martins et al 2020; Pires-Lira et al 2020). These alterations were in line with the number of vessel elements (xylem).…”
Section: Discussionmentioning
confidence: 99%
“…This was demonstrated by the Chl a fluorescence transient and parameters of the JIP test. Plants under stress may show lower φP0 values as well as higher values of φD0, indicating energy dissipation (Umar et al 2019, Santos et al 2020, Sousaraei et al 2021. According to Bolhar-Nordenkampf et al (1989), plants grown under nonstress conditions usually show values of φP0 ≥ 0.75.…”
Section: Discussionmentioning
confidence: 99%