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Reis LC, Scalon SPQ, Foresti AC, Dresch DM, Santos CC, Lima VT. How does shading mitigates the water deficit in young Hymenaea courbaril L. plants? Front Plant Sci 2023; 14:1235234. [PMID: 37794932 PMCID: PMC10546060 DOI: 10.3389/fpls.2023.1235234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 08/21/2023] [Indexed: 10/06/2023]
Abstract
Information on tolerance to isolated or combined abiotic stresses is still scarce for tree species, although such stresses are normal in nature. The interactive effect of light availability and water stress has been reported for some native tree species in Brazil but has not been widely investigated. To test the hypothesis that shading can mitigate the stressful effect of water deficit on the photosynthetic and antioxidant metabolism and on the growth of young Hymenaea courbaril L. plants, we evaluated the following two water regimes: a) continuous irrigation - control (I) - 75% field capacity. and b) water deficit (S), characterized by irrigation suspension associated the two following periods of evaluation: P0 - when the photosynthetic rate of plants subjected to irrigation suspension reached values close to zero, with the seedlings being re-irrigated at that moment, and REC - when the photosynthetic rate of the re-irrigated plants of each shading levels reached values similar to those of plants in the control treatment, totaling four treatments: IP0, SP0, IREC, and SREC. The plants of these four treatments were cultivated under the four following shading levels: 0, 30, 50, and 70%, constituting 16 treatments. Intermediate shading of 30 and 50% mitigates the water deficit and accelerates the recovery of H. courbaril. Water deficit associated with cultivation without shading (0%) should not be adopted in the cultivation or transplantation of H. courbaril. After the resumption of irrigation in the REC, the other characteristics presented a recovery under all cultivation conditions. Key message: Intermediate shading of 30 and 50% mitigates the water deficit and accelerates the recovery of H. courbaril.
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Affiliation(s)
- Lucas C. Reis
- Plant Metabolism and Nutrition Laboratory, Faculty of Agricultural Sciences, Federal University of Grande Dourados, Dourados, State Mato Grosso do Sul, Brazil
| | - Silvana P. Q. Scalon
- Plant Metabolism and Nutrition Laboratory, Faculty of Agricultural Sciences, Federal University of Grande Dourados, Dourados, State Mato Grosso do Sul, Brazil
| | - Andressa C. Foresti
- Plant Metabolism and Nutrition Laboratory, Faculty of Agricultural Sciences, Federal University of Grande Dourados, Dourados, State Mato Grosso do Sul, Brazil
| | - Daiane M. Dresch
- Plant Metabolism and Nutrition Laboratory, Faculty of Agricultural Sciences, Federal University of Grande Dourados, Dourados, State Mato Grosso do Sul, Brazil
| | - Cleberton C. Santos
- Plant Metabolism and Nutrition Laboratory, Faculty of Agricultural Sciences, Federal University of Grande Dourados, Dourados, State Mato Grosso do Sul, Brazil
| | - Vânia T. Lima
- Departament of Botany, Biosciences Institute, São Paulo State University Júlio de Mesquita Filho, Rio Claro, São Paulo, Brazil
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Santos CC, Scalon SPQ, Foresti AC, Reis LC, Dresch DM. The role of silicon in the mitigation of water stress in Eugenia myrcianthes Nied. seedlings. BRAZ J BIOL 2022; 82:e260420. [PMID: 36000691 DOI: 10.1590/1519-6984.260420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 06/07/2022] [Indexed: 11/22/2022] Open
Abstract
Silicon (Si) is a beneficial element that can mitigate effects of water stress on photosynthetic metabolism and plant growth. Thus, the aimed was to evaluate the effect of Si in mitigating the stressful effect of water deficit and flooding in Eugenia myrcianthes Nied. seedlings. The seedlings received three silicon doses (0, 2, and 4 mmol) and were subjected to two water regimes (I - continuous irrigation and S - water fluctuation, characterized as water stress obtained by two cycles of water regimes: irrigation suspension and flooding). Each cycle was ended when the seedlings had a photosynthetic rate close to zero (P0) when the stressful irrigation condition was normalized until the photosynthetic rate reached the values of the control seedlings (REC). The evaluations were carried out in five periods: T0 - initial seedling condition; 1st and 2nd P0; and 1st and 2nd REC. The E. myrcianthes seedlings reached P0 at 22 and 50 days under water deficit and flooding, respectively. Water stress caused damage to photochemical activities in photosystem II. E. myrcianthes is a species sensitive to water stress, but capable of adjusting to water fluctuation, and the application of 2 mmol Si contributed to the regulation of gas exchange, photochemical yields, and growth of this species at the deficit and flooding phases. We emphasize that E. myrcianthes seedlings have potential for resilience due to physiological plasticity, regardless of the silicon application.
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Affiliation(s)
- C C Santos
- Universidade Federal da Grande Dourados, Faculdade de Ciências Agrárias, Dourados, MS, Brasil
| | - S P Q Scalon
- Universidade Federal da Grande Dourados, Faculdade de Ciências Agrárias, Dourados, MS, Brasil
| | - A C Foresti
- Universidade Federal da Grande Dourados, Faculdade de Ciências Agrárias, Dourados, MS, Brasil
| | - L C Reis
- Universidade Federal da Grande Dourados, Faculdade de Ciências Agrárias, Dourados, MS, Brasil
| | - D M Dresch
- Universidade Federal da Grande Dourados, Faculdade de Ciências Agrárias, Dourados, MS, Brasil
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Silva MS, Scalon SPQ, Santos CC, Silverio JM, Santos JKV, Dresch DM. Does silicon help to alleviate water deficit stress and in the recovery of Dipteryx alata seedlings? BRAZ J BIOL 2022; 82:e259016. [PMID: 35946639 DOI: 10.1590/1519-6984.259016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 01/18/2022] [Indexed: 11/22/2022] Open
Abstract
Water deficit to causes serious problems in the growth and development of plants, impairing their metabolism. Thus, it is necessary to use agents that can mitigate plant damage. This study assesses the potential of silicon to mitigate water deficit stress in Dipteryx alata Vogel seedlings and to help in their recovery after the resumption of irrigation. The study analyzed four water regimes: (I) Continuous irrigation; (II) Water deficit without Si; (III) Water deficit + 0.75 mL Si; and (IV) Water deficit + 1.50 mL Si. Seedlings were evaluated in four periods: (1) (T0 - time zero) at the beginning of the experiment, before irrigation suspension; (2) (P0) when the photosynthetic rates (A) of seedlings under irrigation suspension reached values close to zero, period in which irrigation was resumed; (3) (REC) when A reached values close to those of seedlings under continuous irrigation, characterizing the recovery period; and (4) (END) 45 days after REC, when seedlings were kept under continuous irrigation, similar to the control. Application of 0.75 mL Si alleviates damage to the photosynthetic apparatus of D. alata seedlings that remain longer under water deficit, and contributes to faster physiological recovery after the resumption of irrigation. D. alata seedlings have recovery potential after the stress period, regardless of Si application.
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Affiliation(s)
- M S Silva
- Universidade Federal da Grande Dourados - UFGD, Faculty of Agricultural Sciences, Dourados, MS, Brazil
| | - S P Q Scalon
- Universidade Federal da Grande Dourados - UFGD, Faculty of Agricultural Sciences, Dourados, MS, Brazil
| | - C C Santos
- Universidade Federal da Grande Dourados - UFGD, Faculty of Agricultural Sciences, Dourados, MS, Brazil
| | - J M Silverio
- Universidade Federal da Grande Dourados - UFGD, Faculty of Agricultural Sciences, Dourados, MS, Brazil
| | - J K V Santos
- Universidade Federal da Grande Dourados - UFGD, Faculty of Agricultural Sciences, Dourados, MS, Brazil
| | - D M Dresch
- Universidade Federal da Grande Dourados - UFGD, Faculty of Agricultural Sciences, Dourados, MS, Brazil
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Linné JA, Jesus MV, Lima VT, Reis LC, Santos CC, Scalon SPQ, Dresch DM. Do Dipteryx alata Vogel seedlings recover the quality and the photosynthetic and antioxidant responses in the post-flooding? BRAZ J BIOL 2021; 83:e246451. [PMID: 34495152 DOI: 10.1590/1519-6984.246451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 04/16/2021] [Indexed: 11/22/2022] Open
Abstract
Dipteryx alata Vogel is a tree species widely found in Cerrado, settling preferentially in well drained soils. Studies related to ecophysiology of D. alata may contribute to the decision making about using seedlings of this species in projects aimed at the recovery of degraded areas where seasonal flooding happens. This study aimed to assess the effects of flooding on photosynthetic and antioxidant metabolism and quality of D. alata seedlings cultivated or not under flooding during four assessment periods (0, 20, 40, and 60 days), followed by 100 days after the end of each assessment period (0+100, 20+100, 40+100, and 60+100 days), allowing verifying the potential for post-flooding recovery. Flooded plants showed lower photosynthetic efficiency than non-flooded plants, regardless of the periods of exposure. However, this efficiency was recovered in the post-flooding, with values similar to that of the non-flooded seedlings. Moreover, the damage to FV/FM was evidenced by an increase in the period of exposure to flooding, but recovery was also observed at this stage of the photosynthetic metabolism. Seedling quality decreased under flooding, not varying between periods of exposure, but remained lower although the increase observed in the post-flooding period, with no recovery after flooding. The occurrence of hypertrophied lenticels associated with physiological changes and an efficient antioxidant enzyme system might have contributed to the survival and recovery of these seedlings. Thus, this species is sensitive to flooding stress but capable of adjusting and recovering metabolic characteristics at 100 days after the suspension of the water stress, but with no recovery in seedling quality. Thus, we suggested plasticity under the cultivation condition and determined that the time of 100 days is not enough for the complete resumption of growth.
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Affiliation(s)
- J A Linné
- Universidade Federal da Grande Dourados - UFGD, Faculty of Agrarian Sciences - FCA, Dourados, MS, Brasil
| | - M V Jesus
- Universidade Federal da Grande Dourados - UFGD, Faculty of Agrarian Sciences - FCA, Dourados, MS, Brasil
| | - V T Lima
- Universidade Estadual Paulista - UNESP, Institute of Biosciences, Rio Claro, SP, Brasil
| | - L C Reis
- Universidade Federal da Grande Dourados - UFGD, Faculty of Agrarian Sciences - FCA, Dourados, MS, Brasil
| | - C C Santos
- Universidade Federal da Grande Dourados - UFGD, Faculty of Agrarian Sciences - FCA, Dourados, MS, Brasil
| | - S P Q Scalon
- Universidade Federal da Grande Dourados - UFGD, Faculty of Agrarian Sciences - FCA, Dourados, MS, Brasil
| | - D M Dresch
- Universidade Federal da Grande Dourados - UFGD, Faculty of Agrarian Sciences - FCA, Dourados, MS, Brasil
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Bartieres EMM, Dresch DM, Reis LC, Pereira ZV, Mussury RM, Scalon SPQ. Shading minimizes the effects of water deficit in Campomanesia xanthocarpa (Mart.) O. Berg seedlings. BRAZ J BIOL 2021; 83:e244718. [PMID: 34161459 DOI: 10.1590/1519-6984.244718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 01/05/2021] [Indexed: 11/22/2022] Open
Abstract
The objective of this study was to evaluate the activity of antioxidant enzymes, the functioning of the photosystem II and quality of C. xanthocarpa seedlings cultivated under intermittent water deficit and shading levels and the influence of shading on recovery potential after suspension of the stress conditions. The seedlings were subjected to three levels of shading (0, 30, and 70%), six periods of evaluation (start: 0 days; 1st and 2nd photosynthesis zero: 1st and 2nd P0; 1st and 2nd recovery: 1stand 2nd REC; and END), and two forms of irrigation (control: periodically irrigated to maintain 70% substrate water retention capacity, and intermittent irrigation: suspension of irrigation). The plants subjected to intermittent irrigation conditions at 0% shading showed a reduction in water potential (Ψw) and potential quantum efficiency of photosystem II (Fv/Fm) and maximum efficiency of the photochemical process (Fv/F0) and an increase in basal quantum production of the non-photochemical processes (F0/Fm). Superoxide dismutase (SOD) activity was higher in the leaves than in the roots. The C. xanthocarpa is a species sensitive to water deficit but presents strategies to adapt to an environment under temporary water restriction, which are more temporary are most efficient under shading. The seedlings with water deficit at all levels of shading exhibited higher protective antioxidant activity and lower quality at 0% shading. The shading minimizes prevents permanent damage to the photosystem II and after the re-irrigation, the evaluated characteristics showed recovery with respect to the control group, except POD and SOD activities in the leaves.
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Affiliation(s)
- E M M Bartieres
- Universidade Federal da Grande Dourados - UFGD, Faculdade de Ciências Biológicas e Ambientais, Dourados, MS, Brasil
| | - D M Dresch
- Universidade Federal da Grande Dourados, Faculdade de Ciências Agrárias, Dourados, MS, Brasil
| | - L C Reis
- Universidade Federal da Grande Dourados, Faculdade de Ciências Agrárias, Dourados, MS, Brasil
| | - Z V Pereira
- Universidade Federal da Grande Dourados - UFGD, Faculdade de Ciências Biológicas e Ambientais, Dourados, MS, Brasil
| | - R M Mussury
- Universidade Federal da Grande Dourados - UFGD, Faculdade de Ciências Biológicas e Ambientais, Dourados, MS, Brasil
| | - S P Q Scalon
- Universidade Federal da Grande Dourados, Faculdade de Ciências Agrárias, Dourados, MS, Brasil
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Bastos SS, Scalon SPQ, Souza APR, Dresch DM, Junglos FS, Scalon LQ, Mussury RM, Freitas VMB. Photosynthetic metabolism and antioxidant in Ormosia arborea are modulated by abscisic acid under water deficit? BRAZ J BIOL 2021; 82:e244331. [PMID: 34076168 DOI: 10.1590/1519-6984.244331] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 12/03/2020] [Indexed: 11/22/2022] Open
Abstract
The aim of this research was to evaluate the effect of abscisic acid (ABA) on gas exchange and the activity of antioxidant enzymes of Ormosia arborea (Vell.) Harms seedlings under water deficit and its influence on the recovery potential of the seedlings. The experiment was conducted using four treatments, being daily irrigation or water restriction without and with 10 μM ABA. Seedlings under water deficit + ABA showed greater adjustment to drought, and when re-irrigated, they restored photosynthetic metabolism and water potential. ABA minimizes the reduction in the photosynthetic metabolism and water potential of the leaf, however, it does not increase the antioxidant activity of the O. arborea seedlings under water deficit. These results suggest that this species exhibits plasticity, which enables it to survive also in environments subjected to temporary water deficit regardless of the supplementation of ABA. We suggest that other doses of ABA be researched to expand the beneficial effect of ABA on this species.
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Affiliation(s)
- S S Bastos
- Universidade Federal da Grande Dourados - UFGD, Faculdade de Ciências Biológicas e Ambientais - FCBA, Dourados, MS, Brasil
| | - S P Q Scalon
- Universidade Federal da Grande Dourados - UFGD, Faculdade de Ciências Agrárias - FCA, Dourados, MS, Brasil
| | - A P R Souza
- Universidade Federal da Grande Dourados - UFGD, Faculdade de Ciências Biológicas e Ambientais - FCBA, Dourados, MS, Brasil
| | - D M Dresch
- Universidade Federal da Grande Dourados - UFGD, Faculdade de Ciências Agrárias - FCA, Dourados, MS, Brasil
| | - F S Junglos
- Universidade Federal da Grande Dourados - UFGD, Faculdade de Ciências Biológicas e Ambientais - FCBA, Dourados, MS, Brasil
| | - L Q Scalon
- Universidade Federal da Grande Dourados - UFGD, Faculdade de Ciências Agrárias - FCA, Dourados, MS, Brasil
| | - R M Mussury
- Universidade Federal da Grande Dourados - UFGD, Faculdade de Ciências Biológicas e Ambientais - FCBA, Dourados, MS, Brasil
| | - V M B Freitas
- Universidade Federal da Grande Dourados - UFGD, Faculdade de Ciências Agrárias - FCA, Dourados, MS, Brasil
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Cremon T, Dresch DM, Scalon SPQ, Masetto TE. Drying and reduction in sensitivity to desiccation of seeds of Alibertia edulis: the influence of fruit ripening stage. AN ACAD BRAS CIENC 2018; 90:1481-1491. [PMID: 29898107 DOI: 10.1590/0001-3765201820170664] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 11/08/2017] [Indexed: 11/22/2022] Open
Abstract
The intense environmental degradation in tropical regions suitable for agriculture has decreased native forest populations of plants with important fruits and medicinal properties. Alibertia edulis is a native tree from the Brazilian Cerrado. Knowledge about the effects of drying and storage on the physiological behavior of its seeds may aid in its sustainable exploitation and conservation. The goal of the present study was to determine which fruit ripening stage results in A. edulis seeds with higher tolerance to desiccation, and to investigate the effectiveness of polyethylene glycol (PEG) induced osmotic stress in combination with abscisic acid (ABA) in increasing seed desiccation tolerance during storage. Seeds were dried in activated silica gel (fast) or under ambient conditions (slow). Seeds originating from mid-ripe or fully ripe fruits exhibited better physiological performance than those obtained from green fruits. Slow drying resulted in seeds with high physiological potential. Seeds may be stored for up to 180 days without losing viability when treated with -0.73 MPa PEG without ABA.
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Affiliation(s)
- Thais Cremon
- Faculdade de Ciências Agrárias/FCA, Universidade Federal da Grande Dourados/UFGD, Rodovia Dourados, Itahum, Km 12, Cidade Universitária, 79804-970 Dourados, MS, Brazil
| | - Daiane M Dresch
- Faculdade de Ciências Agrárias/FCA, Universidade Federal da Grande Dourados/UFGD, Rodovia Dourados, Itahum, Km 12, Cidade Universitária, 79804-970 Dourados, MS, Brazil
| | - Silvana P Q Scalon
- Faculdade de Ciências Agrárias/FCA, Universidade Federal da Grande Dourados/UFGD, Rodovia Dourados, Itahum, Km 12, Cidade Universitária, 79804-970 Dourados, MS, Brazil
| | - Tathiana E Masetto
- Faculdade de Ciências Agrárias/FCA, Universidade Federal da Grande Dourados/UFGD, Rodovia Dourados, Itahum, Km 12, Cidade Universitária, 79804-970 Dourados, MS, Brazil
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Couto IFS, Fuchs ML, Pereira FF, Mauad M, Scalon SPQ, Dresch DM, Mussury RM. Feeding preference of Plutella xylostella for leaves treated with plant extracts. AN ACAD BRAS CIENC 2016; 88:1781-1789. [PMID: 27901190 DOI: 10.1590/0001-3765201620150236] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 12/17/2015] [Indexed: 11/22/2022] Open
Abstract
Plutella xylostella L. is one of the main agents to cause damages to plants of Brassica genus, provoking negative impacts in cultures. The use of botanical extracts in plants protection has been related in literature, however, their use in the species analyzed in this study is not yet reported. We assessed the effect of aqueous and methanolic extracts of the species: Schinus terebinthifolius Raddi (Pink Pepper), Annona coriacea Mart. (Araticum), Duguetia furfuracea (A. St.-Hil.) Benth. & Hook. (Pindaúva do campo) and Trichilia silvatica C. DC. (Catiguá-branco), occuring in the state of Mato Grosso do Sul and whose feeding preference of P. xylostella larvae of 3rd instar. We intend to answer the following questions: (1) Are the plant species analyzed fagodeterrentes? (2) what type of extract produces the least food preferrence? To answer these questions, we treated cabbage disks with aqueous extracts stored in a refrigerator in periods of 0, 7, 14 and 21 days and the methanolic extracts were treated at concentrations of 0.5 mg/mL, 1.0 mg/mL, 2.0mg/mL. The aqueous and methanolic extracts of T. silvatica presented the lowest values of feeding preference, 0.113 and 0.06, respectively, compared to other extracts.
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Affiliation(s)
- Irys F S Couto
- Universidade Federal da Grande Dourados/ UFGD, Faculdade de Ciências Biológicas e Ambientais/ FCBA, Rodovia Dourados - Itahum Km 12, 79804-970 Dourados, MS, Brasil
| | - Mateus L Fuchs
- Universidade Federal da Grande Dourados/ UFGD, Faculdade de Ciências Agrárias/ FCA, Rodovia Dourados - Itahum Km 12, 79804-970 Dourados, MS, Brasil
| | - Fabrício F Pereira
- Universidade Federal da Grande Dourados/ UFGD, Faculdade de Ciências Biológicas e Ambientais/ FCBA, Rodovia Dourados - Itahum Km 12, 79804-970 Dourados, MS, Brasil
| | - Munir Mauad
- Universidade Federal da Grande Dourados/ UFGD, Faculdade de Ciências Agrárias/ FCA, Rodovia Dourados - Itahum Km 12, 79804-970 Dourados, MS, Brasil
| | - Silvana P Q Scalon
- Universidade Federal da Grande Dourados/ UFGD, Faculdade de Ciências Agrárias/ FCA, Rodovia Dourados - Itahum Km 12, 79804-970 Dourados, MS, Brasil
| | - Daiane M Dresch
- Universidade Federal da Grande Dourados/ UFGD, Faculdade de Ciências Agrárias/ FCA, Rodovia Dourados - Itahum Km 12, 79804-970 Dourados, MS, Brasil
| | - Rosilda M Mussury
- Universidade Federal da Grande Dourados/ UFGD, Faculdade de Ciências Biológicas e Ambientais/ FCBA, Rodovia Dourados - Itahum Km 12, 79804-970 Dourados, MS, Brasil
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Scalon SPQ, Jeromini TS, Mussury RM, Dresch DM. Photosynthetic metabolism and quality of Eugenia pyriformis Cambess. seedlings on substrate function and water levels. AN ACAD BRAS CIENC 2015; 86:2039-48. [PMID: 25590738 DOI: 10.1590/0001-3765201420130249] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 05/05/2014] [Indexed: 11/21/2022] Open
Abstract
The aim of this research was to evaluate the quality and photosynthetic metabolism of "uvaia" seedlings (Eugenia pyriformis Cambess.) on different substrates and water regimes. The seeds were sown in tubes of 50 x 190 mm in the following substrates: Sand (S), Latosol + Sand (L + S) (1:1), Latosol + Sand + Semi Decomposed Poultry Litter (L + S1 + PL) ( 1:1:0.5), Latosol + Sand + Semi Decomposed Poultry Litter (L + S2 + PL) (1:2:0.5), Latosol + Bioplant® (L + B) (1:1), and the water levels assessed were 50, 75 and 100% of water retention capacity. At 60, 90, 120 and 150 days the seedlings were evaluated according to their chlorophyll index, leaf area (cm2) and Dickson Quality Index (DQI) and at 150 days their internal concentration of carbon (mol m-2 s-1), stomatal conductance (mol m-2 s-1), transpiration rate (mmol m-2 s-1), photosynthesis (µmol m-2 s-1) and efficiency of water use (µmol de CO2 / mmol de H2O). Until their 150th days, the seedlings had higher quality and photosynthetic metabolism when cultured with substrates containing latosol + sand + poultry litter on the two variations assessed and water retention capacity of 50%.
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Affiliation(s)
- Silvana P Q Scalon
- Faculdade de Ciências Agrárias, Universidade Federal da Grande Dourados/UFGD, Dourados, MS, Brasil
| | - Tatiane S Jeromini
- Faculdade de Ciências Agrárias, Universidade Federal da Grande Dourados/UFGD, Dourados, MS, Brasil
| | - Rosilda M Mussury
- Faculdade de Ciências Biológicas e Ambientais, Universidade Federal da Grande Dourados/UFGD, Dourados, MS, Brasil
| | - Daiane M Dresch
- Faculdade de Ciências Agrárias, Universidade Federal da Grande Dourados, Dourados, MS, Brasil
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10
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Dresch DM, Scalon SPQ, Masetto TE. Effect of storage in overcoming seed dormancy of Annona coriacea Mart. seeds. AN ACAD BRAS CIENC 2015; 86:2077-85. [PMID: 25590742 DOI: 10.1590/0001-3765201420130276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Accepted: 05/16/2014] [Indexed: 11/21/2022] Open
Abstract
The aim of this study was to evaluate the effect of pre-treatments on overcoming dormancy of A. coriacea seeds. Seeds were processed and stored in polyethylene bags at temperatures of at -18°C (42% RH), 5°C (34% RH), 15°C (60% RH) and 25°C (34% RH), during 0, 30, 60, 90, 120 and 150 days. After storage, seeds were immersed in 350 mg.L-1 gibberellic acid for 144 hours. Sowing was carried out in plastic bags containing Red Latosol + Bioplant®. Moisture content, emergence percentage, emergence speed index, length and dry mass of seedlings, were evaluated. The experimental design was completely randomized in a factorial with four replications of 50 seeds each. The seed storage at 5°C and subsequent immersion in gibberellic acid was efficient to reach high percentage, emergence speed and plant growth. A. coriacea seeds showed non-deep simple morphophysiological dormancy wherein the physiological component can be overcome after the seeds are storage at 5°C for a maximum period of 53 days and subsequent immersed in exogenous GA (350 mg.L-1 for 144 hours).
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Affiliation(s)
- Daiane M Dresch
- Pós-Doutoranda em Agronomia, Universidade Federal da Grande Dourados, (UFGD), Faculdade de Ciências Agrárias, Dourados, MS, Brasil
| | - Silvana P Q Scalon
- Universidade Federal da Grande Dourados, (UFGD), Faculdade de Ciências Agrárias, Dourados, MS, Brasil
| | - Tathiana E Masetto
- Universidade Federal da Grande Dourados, (UFGD), Faculdade de Ciências Agrárias, Dourados, MS, Brasil
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