Rosana Maria dos Santos Nani de Miranda
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Rosana Maria dos Santos Nani de Miranda has a total of 18 co-authors. Here are the top co-authors by number of shared publications:
- Diesily de Andrade Neves
Plant Physiology Laboratory (LMGV), State University of North Fluminense Darcy Ribeiro (UENF), 2000 Alberto Lamego Ave., Parque Califórnia, Campos dos Goytacazes 28013-602, RJ, Brazil
2 shared publications - Eliemar Campostrini
Universidade Estadual do Norte Fluminense Darcy Ribeiro
2 shared publications - Guilherme Augusto Rodrigues de Souza
Setor de Fisiologia Vegetal, Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense, Avenida Alberto Lamego 2000, Parque Califórnia, Campos dos Goytacazes 28013-602, RJ, Brazil
2 shared publications - Amanda Lúcia Pereira Machado da Silva
Plant Physiology Laboratory (LMGV), Universidade Estadual do Norte Fluminense (UENF), 2000 Avenida Alberto Lamego, Campos dos Goytacazes, RJ, 28013-602, Brazil.
1 shared publication - Claudia Franca Barros
Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Brazil
1 shared publication - Ingrid Trancoso
Setor de Fisiologia Vegetal, Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense (UENF), Avenida Alberto Lamego 2000, Parque Califórnia, Campos dos Goytacazes 28013-602, RJ, Brazil
1 shared publication
Latest Publications
- 18 August 2025
- Published by Springer Nature in Trees
- Vol. 39 (5) , 1-22
Processed-kaolin particle film can mitigate solar radiation damage in young Atlantic Forest species
- 18 August 2025
- Published by Springer Nature in Trees
- Vol. 39 (5) , 1-22
Processed-kaolin particle film can mitigate solar radiation damage in young Atlantic Forest species
- Open Access
Water Stress Promotes Secondary Sexual Dimorphism in Ecophysiological Traits of Papaya Seedlings
Plant genders could express different functional strategies to compensate for different reproductive costs, as females have an additional role in fruit and seed production. Secondary sexual dimorphism (SSD) expression is frequently greater under stress than under optimal growth conditions. The early gender identification in papaya may help to reduce orchard costs because the most desirable fruit shape is formed by hermaphrodite plants. We hypothesized that (a) gender ecophysiological phenotyping can be an alternative to make gender segregations in papaya seedlings, and (b) such gender segregation will be more efficient after a short drought exposure than under adequate water conditions. To test such hypotheses, seedlings of two papaya varieties (‘Candy’ and ‘THB’) were exposed to two kind of treatments: (1) water shortage (WS) for 45 h, after which they were well watered, and (2) continuously well-watered (WW). Study assessed the ecophysiological responses, such as stomatal conductance (gs), SPAD index, optical reflectance indices, morphological traits, and biomass accumulation in females (F) and hermaphrodites (H). In WS treatment, the SSD was expressed in 14 of 18 traits investigated, while in WW treatment, the SSD was expressed only in 7 of 18 traits. As tools for SSD expression, gs and simple ratio pigment index (SRPI) must be measured on the first or second day after the imposed WS was interrupted, respectively, while the other parameters must be measured after a period of four days. In some traits, the SSD was expressed in only one variety, or the response of H and F plants were of opposite values for two varieties. The choice of the clearest responses of gender segregation in WS treatment will be greenness index, combination of normalized difference vegetation index (CNDVI), photochemical reflectance index (PRI), water band index (WBI), SRPI, leaf number, leaf dry mass, and leaf mass ratio. If the WW conditions are maintained for papaya seedling production, the recommendation in gender segregation will be the analysis of CNDVI, carotenoid reflectance index 2 (CRI2), WBI, and SRPI. The non-destructive optical leaf indices segregated papaya hermaphrodites from females under both water conditions and eventually could be adjusted for wide-scale platform evaluations, with planned space arrangements of seedlings, and sensor’s set.
Open AccessWater Stress Promotes Secondary Sexual Dimorphism in Ecophysiological Traits of Papaya Seedlings
Plant genders could express different functional strategies to compensate for different reproductive costs, as females have an additional role in fruit and seed production. Secondary sexual dimorphism (SSD) expression is frequently greater under stress than under optimal growth conditions. The early gender identification in papaya may help to reduce orchard costs because the most desirable fruit shape is formed by hermaphrodite plants. We hypothesized that (a) gender ecophysiological phenotyping can be an alternative to make gender segregations in papaya seedlings, and (b) such gender segregation will be more efficient after a short drought exposure than under adequate water conditions. To test such hypotheses, seedlings of two papaya varieties (‘Candy’ and ‘THB’) were exposed to two kind of treatments: (1) water shortage (WS) for 45 h, after which they were well watered, and (2) continuously well-watered (WW). Study assessed the ecophysiological responses, such as stomatal conductance (gs), SPAD index, optical reflectance indices, morphological traits, and biomass accumulation in females (F) and hermaphrodites (H). In WS treatment, the SSD was expressed in 14 of 18 traits investigated, while in WW treatment, the SSD was expressed only in 7 of 18 traits. As tools for SSD expression, gs and simple ratio pigment index (SRPI) must be measured on the first or second day after the imposed WS was interrupted, respectively, while the other parameters must be measured after a period of four days. In some traits, the SSD was expressed in only one variety, or the response of H and F plants were of opposite values for two varieties. The choice of the clearest responses of gender segregation in WS treatment will be greenness index, combination of normalized difference vegetation index (CNDVI), photochemical reflectance index (PRI), water band index (WBI), SRPI, leaf number, leaf dry mass, and leaf mass ratio. If the WW conditions are maintained for papaya seedling production, the recommendation in gender segregation will be the analysis of CNDVI, carotenoid reflectance index 2 (CRI2), WBI, and SRPI. The non-destructive optical leaf indices segregated papaya hermaphrodites from females under both water conditions and eventually could be adjusted for wide-scale platform evaluations, with planned space arrangements of seedlings, and sensor’s set.