Estratégias no uso da energia luminosa por plantas jovens de Genipa spruceana Steyerm submetidas ao alagamento

Gonçalves, José Francisco de Carvalho; Melo, Emanuele Gurgel de Freitas; Silva, Carlos Eduardo Moura da; Ferreira, Marciel José; Justino, Gilberto Costa

doi:10.1590/s0102-33062012000200014

Cited by 13 publications

(12 citation statements)

References 36 publications

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“…In Aloysia gratissima (Gill et Hook) Tronc., a significant effect was observed in root dry matter of plants grown in full sun and shaded by 40 and 80% with Aluminet® screens, obtaining values of 32.8, 43.8, and 15.8 g, respectively (Pinto et al, 2007). According to Gonçalves et al (2012), plants that grow in full sun present higher transpiration flows and require larger and more efficient root systems, with a better developed vascular system.…”

Section: Resultsmentioning

confidence: 99%

Plant biometric characterization and leaf micromorphometry of Talinum triangulare (Jacq.) Willd cultivated under shade

et al. 2018

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Talinum triangulare (Jacq.) Willd, known as Ceylon spinach, Surinam purslane, or waterleaf, is cultivated for medicinal and food purposes. Among environmental factors, light is an important regulator of primary production, contributing to plant growth. However, the success of each plant species depends on its morphoanatomical responses to light. The aim of this study was to determine whether T. triangulare leaf micromorphometry is affected when grown in full sun and under shade, and if so, which plant biometric variables are affected. T. triangulare cultivation was tested in beds arranged in blocks under shade levels of 0, 18, 30, and 50%. Each bed was considered a basic experimental unit, totaling four replications per treatment. Plant height, stem diameter, leaf area, leaf fresh weight, stem fresh weight, specific leaf area, leaf area ratio, abaxial epidermis, and mesophyll thickness were higher as shade levels increased. However, there was a decrease in the number of leaves, root to shoot ratio, stomatal density on abaxial and adaxial surfaces, and palisade parenchyma thickness. Nevertheless, root length, leaf and stem dry weights, leaf weight ratio, adaxial stomatal index, adaxial epidermis, and spongy parenchyma thickness remained constant. Plants responded differently to shade, with morphological and anatomical changes, suggesting a phenotypic plasticity and raising the possibility of being grown both in shaded environments and in full sunlight.

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Section: Resultsmentioning

confidence: 99%

Plant biometric characterization and leaf micromorphometry of Talinum triangulare (Jacq.) Willd cultivated under shade

et al. 2018

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“…Gonçalves et al (2012) suggested that the flow of light energy into G. spruceana seedlings under total flooding, at the beginning, it was more restricted by a light harvesting structure decrease than in the functioning of the photosynthetic complex. Similarly to these authors, was observed differences between the density of molecules in the reaction center and the time of experimentation.…”

Section: Resultsmentioning

confidence: 99%

Chlorophyll a fluorescence in two varieties of sugar cane subjected to aluminum and water stress

Ecco¹,

Santiago²,

Lima³

2013

Afr. J. Agric. Res

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Soils of open pasture in the Cerrado (brazilian savanna) have farming limitations related to the high content of aluminum and water restrictions in the superficial horizons, due to easy drainage and large exposure to high levels of irradiance. Aiming to assess chlorophyll a fluorescence's responses in two varieties of sugar cane in the State of Mato Grosso do Sul subjected to water restriction and different aluminum contents, an experiment was conducted in a controlled environment. The experimental lineation consisted of random blocks in a factorial scheme (2 varieties x 2 levels of water available in the soil based on field capacity [cc] and 3 contents of Al +3 ), with 15 replications. Significant differences were observed throughout and at the end of the experiment between the averages of some parameters of chlorophyll a fluorescence for treatment EH1 and between varieties. Results obtained by means of the OJIP test were the most efficient for variety distinction. RB1 (RB 8555536) proved to be more responsive to treatments, variety RB2 (RB867515) did not present significant alterations between treatments; its suggests that most part of the radiation was efficiently used in the photochemical stage of photosynthesis, that makes it more tolerant to the subjected stresses.

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“…Stress caused to plants by the influence of an environment different from that to which they are adapted reflects in anatomical, morphological, and physiological changes (Gonçalves et al, 2012;Ismail et al, 2012). Thus, acclimatization capacity of a species is a key point in maximizing resources essential for survival under these conditions (Dias-Filho and Carvalho, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…A reduction in the accumulation of root, stem, and branch biomass, formation of adventitious roots and aerenchyma/pneumatophores, leaf expansion, or induction of leaf abscission are some of the main responses evidenced by water stress on susceptible plants (Colmer and Pedersen, 2008). Susceptible species at more advanced stages submitted to soil flooding showed more intense stress symptoms, such as leaf yellowing related to the degradation or decrease of their synthesis by low nitrogen uptake in the roots, which leads to photoinhibition, necrosis, and tissue death (Gonçalves et al, 2012).…”

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confidence: 99%

Goosegrass: Morphophysiological Characterization Under Water Excess Conditions

et al. 2019

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Eleusine indica (L.) Gaertn. (goosegrass) is a grass species that has global prominence as a weed in areas typical of the soybean crop. However, its dispersion in recent years has been reported expressively for areas of poorly drained soil, in which irrigated rice is cultivated (lowlands). Little is known on its behavior and biology in this different ecosystem. This study aimed to evaluate if Eleusine indica can survive and withstand flooding. The experimental design was a completely randomized (two-way), in which two E. indica biotypes, one from the uplands (without flooding) and the other from the lowlands (with flooding), were submitted to three soil water conditions: 50 and 100% water retention capacity and soil under water depth. Photosynthetic and gas exchange parameters (photosynthetic rate, stomatal conductance, intercellular CO2 concentration, transpiration, water use efficiency, and assimilation rate by Rubisco) were determined. Morphological diversity of biotypes was evaluated through descriptors. The existence of typical lowland biotype could not be characterized. However, both biotypes were able to survive, develop, and generate seeds in a flooded environment in the irrigated rice system.

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Estratégias no uso da energia luminosa por plantas jovens de Genipa spruceana Steyerm submetidas ao alagamento

Cited by 13 publications

References 36 publications

Plant biometric characterization and leaf micromorphometry of Talinum triangulare (Jacq.) Willd cultivated under shade

Plant biometric characterization and leaf micromorphometry of Talinum triangulare (Jacq.) Willd cultivated under shade

Chlorophyll a fluorescence in two varieties of sugar cane subjected to aluminum and water stress

Goosegrass: Morphophysiological Characterization Under Water Excess Conditions

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