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Miranda MT, Pires GS, Pereira L, de Lima RF, da Silva SF, Mayer JLS, Azevedo FA, Machado EC, Jansen S, Ribeiro RV. Rootstocks affect the vulnerability to embolism and pit membrane thickness in Citrus scions. Plant Cell Environ 2024. [PMID: 38660960 DOI: 10.1111/pce.14924] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 04/08/2024] [Accepted: 04/10/2024] [Indexed: 04/26/2024]
Abstract
Embolism resistance of xylem tissue varies among species and is an important trait related to drought resistance, with anatomical attributes like pit membrane thickness playing an important role in avoiding embolism spread. Grafted Citrus trees are commonly grown in orchards, with the rootstock being able to affect the drought resistance of the whole plant. Here, we evaluated how rootstocks affect the vulnerability to embolism resistance of the scion using several rootstock/scion combinations. Scions of 'Tahiti' acid lime, 'Hamlin', 'Pera' and 'Valencia' oranges grafted on a 'Rangpur' lime rootstock exhibit similar vulnerability to embolism. In field-grown trees, measurements of leaf water potential did not suggest significant embolism formation during the dry season, while stomata of Citrus trees presented an isohydric response to declining water availability. When 'Valencia' orange scions were grafted on 'Rangpur' lime, 'IAC 1710' citrandarin, 'Sunki Tropical' mandarin or 'Swingle' citrumelo rootstocks, variation in intervessel pit membrane thickness of the scion was found. The 'Rangpur' lime rootstock, which is known for its drought resistance, induced thicker pit membranes in the scion, resulting in higher embolism resistance than the other rootstocks. Similarly, the rootstock 'IAC 1710' citrandarin generated increased embolism resistance of the scion, which is highly relevant for citriculture.
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Affiliation(s)
- Marcela T Miranda
- Laboratory of Plant Physiology 'Coaracy M. Franco', Center of Agricultural and Post-Harvest Biosystems, Agronomic Institute (IAC), Campinas, SP, Brazil
- Institute of Botany, Ulm University, Ulm, Germany
| | - Gabriel S Pires
- Laboratory of Crop Physiology (LCroP), Department of Plant Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | | | - Rodrigo F de Lima
- Laboratory of Plant Anatomy, Department of Plant Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Simone F da Silva
- Laboratory of Crop Physiology (LCroP), Department of Plant Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Juliana L S Mayer
- Laboratory of Plant Anatomy, Department of Plant Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Fernando A Azevedo
- Center of Citriculture Sylvio Moreira, Agronomic Institute (IAC), Cordeirópolis, SP, Brazil
| | - Eduardo C Machado
- Laboratory of Plant Physiology 'Coaracy M. Franco', Center of Agricultural and Post-Harvest Biosystems, Agronomic Institute (IAC), Campinas, SP, Brazil
| | | | - Rafael V Ribeiro
- Laboratory of Crop Physiology (LCroP), Department of Plant Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, SP, Brazil
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2
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Leroy-Freitas D, Machado EC, Torres-Franco AF, Dias MF, Leal CD, Araújo JC. Exploring the microbiome, antibiotic resistance genes, mobile genetic element, and potential resistant pathogens in municipal wastewater treatment plants in Brazil. Sci Total Environ 2022; 842:156773. [PMID: 35724791 DOI: 10.1016/j.scitotenv.2022.156773] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 06/05/2022] [Accepted: 06/14/2022] [Indexed: 05/28/2023]
Abstract
Wastewater treatment plants (WWTPs) have been widely investigated in Europe, Asia and North America regarding the occurrence and fate of antibiotic resistance (AR) elements, such as antibiotic resistance genes (ARGs), mobile genetic elements (MGEs) and antibiotic resistant bacteria and pathogens. However, monitoring data about AR elements in municipal WWTPs in Brazil are scarce. This study investigated the abundance of intI1, five ARGs (sul1, tetA, blaTEM, ermB and qnrB) and 16S rRNA in raw and treated wastewater of three WWTPs, using different sewage treatments named CAS (Conventional activated sludge), UASB/BTF (UASB followed by biological trickling filter) and MAS/UV (modified activated sludge with UV disinfection stage). Bacterial diversity and the presence of potentially pathogenic groups were also evaluated, and associations between genetic markers and the bacterial populations were presented. All WWTPs decreased the loads of genetic markers finally discharged to receiving water bodies and showed no evidence of being hotspots for antimicrobial resistance amplification in wastewater, since the abundances of intI1 and ARGs within the bacterial population were not increased in the treated effluents. UASB/BTF showed a similar performance to that of the CAS and MAS/UV, reinforcing the sanitary and environmental advantages of this biological treatment, widely applied for wastewater treatment in warm climate regions. Bacterial diversity and richness increased after treatments, and bacterial communities in wastewater samples differed due to catchment areas and treatment typologies. Potential pathogenic population underwent considerable decrease after the treatments; however, strong significant correlations with intI1 and ARGs revealed potential multidrug-resistant pathogenic bacteria (Aeromonas, Arcobacter, Enterobacter, Escherichia-Shigella, Stenotrophomonas and Streptococcus) in the treated effluents, although in reduced relative abundances. These are contributive results for understanding the fate of ARGs, MGEs and potential pathogenic bacteria after wastewater treatments, which might support actions to mitigate their release into Brazilian aquatic environments in the near future.
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Affiliation(s)
- D Leroy-Freitas
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte 31270-010, Brazil
| | - E C Machado
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte 31270-010, Brazil
| | - A F Torres-Franco
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte 31270-010, Brazil; Institute of Sustainable Processes, Valladolid University, Dr. Mergelina s/n., Valladolid 47011, Spain
| | - M F Dias
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte 31270-010, Brazil
| | - C D Leal
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte 31270-010, Brazil
| | - J C Araújo
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte 31270-010, Brazil.
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Cruz LP, Machado EC, Ribeiro RV. Estimating the light conversion efficiency by sugarcane: the segmented approach. AN ACAD BRAS CIENC 2022; 94:e20211317. [PMID: 35703699 DOI: 10.1590/0001-3765202220211317] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 12/07/2021] [Indexed: 11/22/2022] Open
Abstract
The classical method to estimate the light conversion efficiency (εc) gives a single value for the whole crop cycle (εco) but does not reveal any variation along the growing season. We proposed the segmented approach to uncover such variations along sugarcane (Saccharum sp. hybrid) growth cycle. Our analyses revealed that longer sampling intervals could overestimate εco and that the segmented light conversion efficiency (εcs) varied between 0.09 and 5.39 g MJ-1 during the crop cycle. The εcs would provide insights on how the environment affects εc and how to increase biomass production through crop management practices.
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Affiliation(s)
- Larissa P Cruz
- Universidade de Campinas (UNICAMP), Instituto de Biologia, Departamento de Biologia Vegetal, Laboratório de Fisiologia de Plantas Cultivadas (LCroP), Rua Monteiro Lobato, 255, 13083-970 Campinas, SP, Brazil.,Programa de Pós-Graduação em Bioenergia, Universidade Estadual de Campinas (UNICAMP), Faculdade de Engenharia de Alimentos, Rua Monteiro Lobato, 80, 13083-862 Campinas, SP, Brazil
| | - Eduardo C Machado
- Instituto Agronômico (IAC), Centro de Pesquisa e Desenvolvimento de Biossistemas Agrícolas e Pós-Colheita, Laboratório de Fisiologia Vegetal "Coaracy M. Franco", Av. Dr. Theodureto de Almeida Camargo, 1500, 13075-630 Campinas, SP, Brazil
| | - Rafael V Ribeiro
- Universidade de Campinas (UNICAMP), Instituto de Biologia, Departamento de Biologia Vegetal, Laboratório de Fisiologia de Plantas Cultivadas (LCroP), Rua Monteiro Lobato, 255, 13083-970 Campinas, SP, Brazil
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4
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Miranda MT, Espinoza-Núñez E, Silva SF, Pereira L, Hayashi AH, Boscariol-Camargo RL, Carvalho SA, Machado EC, Ribeiro RV. Water stress signaling and hydraulic traits in three congeneric citrus species under water deficit. Plant Sci 2022; 319:111255. [PMID: 35487664 DOI: 10.1016/j.plantsci.2022.111255] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 03/07/2022] [Accepted: 03/12/2022] [Indexed: 06/14/2023]
Abstract
Morpho-physiological strategies to deal with water deficit vary among citrus species and the chemical signaling through ABA and anatomical, hydraulic, and physiological traits were evaluated in saplings of Rangpur lime, Swingle citrumelo and Valencia sweet orange. Trunk and roots of Swingle citrumelo presented lower vessel diameter and higher vessel frequency as compared to the other species. However, relative water content at the turgor loss point (RWCTLP), the osmotic potential at full turgor (Ψ0), the osmotic potential at the turgor loss point (ΨTLP), bulk modulus of elasticity (ε) and the xylem water potential when hydraulic conductivity is reduced by 50% (Ψ50) and 88% (Ψ88) indicated similar hydraulic traits among citrus species, with Rangpur lime showing the highest hydraulic safety margin. Roots of Rangpur lime and Swingle citrumelo were more water conductive than ones of Valencia sweet orange, which was linked to higher stomatal conductance. Chemical signaling through ABA prevented shoot dehydration in Rangpur lime under water deficit, with this species showing a more conservative stomatal behavior, sensing, and responding rapidly to low soil moisture. Taken together, our results suggest that Rangpur lime - the drought tolerant species - has an improved control of leaf water status due to chemical signaling and effective stomatal regulation for reducing water loss as well as decreased root hydraulic conductivity for saving water resources under limiting conditions.
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Affiliation(s)
- Marcela T Miranda
- Agronomic Institute (IAC), Center R&D in Ecophysiology and Biophysics, Laboratory of Plant Physiology "Coaracy M. Franco", P.O. Box 28, Campinas 13012-970, SP, Brazil; University of Campinas (UNICAMP), Department of Plant Biology, Laboratory of Crop Physiology, P.O. Box 6109, Campinas 13083-970, SP, Brazil
| | - Erick Espinoza-Núñez
- Agronomic Institute (IAC), Center R&D in Ecophysiology and Biophysics, Laboratory of Plant Physiology "Coaracy M. Franco", P.O. Box 28, Campinas 13012-970, SP, Brazil; Universidad Nacional Agraria La Molina (UNALM), Department of Horticulture, La Molina, Lima, Peru
| | - Simone F Silva
- University of Campinas (UNICAMP), Department of Plant Biology, Laboratory of Crop Physiology, P.O. Box 6109, Campinas 13083-970, SP, Brazil
| | - Luciano Pereira
- University of Campinas (UNICAMP), Department of Plant Biology, Laboratory of Crop Physiology, P.O. Box 6109, Campinas 13083-970, SP, Brazil; Ulm University, Institute of Systematic Botany and Ecology, Ulm, Germany
| | - Adriana H Hayashi
- Instituto de Botânica, Núcleo de Pesquisa em Anatomia, São Paulo, SP, Brazil
| | | | - Sérgio A Carvalho
- Agronomic Institute (IAC), Center of Citriculture Sylvio Moreira, Cordeirópolis, SP, Brazil
| | - Eduardo C Machado
- Agronomic Institute (IAC), Center R&D in Ecophysiology and Biophysics, Laboratory of Plant Physiology "Coaracy M. Franco", P.O. Box 28, Campinas 13012-970, SP, Brazil
| | - Rafael V Ribeiro
- University of Campinas (UNICAMP), Department of Plant Biology, Laboratory of Crop Physiology, P.O. Box 6109, Campinas 13083-970, SP, Brazil.
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Ribeiro RV, Ottosen CO, Rosenqvist E, Medanha T, Abdelhakim L, Machado EC, Struik PC. Elevated CO 2 concentration increases photosynthetic sensitivity to nitrogen supply of sorghum in a genotype-dependent manner. Plant Physiol Biochem 2021; 168:202-210. [PMID: 34649023 DOI: 10.1016/j.plaphy.2021.10.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 09/22/2021] [Accepted: 10/02/2021] [Indexed: 06/13/2023]
Abstract
We hypothesized that elevated [CO2] only increases sorghum photosynthesis under low nitrogen availability and evaluated whether cultivars BRS373 (grain), BRS511 (saccharine) and BRS655 (forage) differ in their sensitivity to nitrogen and [CO2]. Plants were grown in growth chambers where air [CO2] was 400 (a[CO2]) or 800 (e[CO2]) μmol CO2 mol-1 and supplied with nutrient solution containing 211 (HN) or 48 (LN) ppm N for 45 days. Photosynthetic traits were measured in fully expanded leaves as well as leaf nitrogen and biomass accumulation. e[CO2] increased the sensitivity of photosynthesis to LN, with all sorghum cultivars having lower maximum Rubisco carboxylation rate, effective quantum efficiency of PSII and stomatal conductance at LN than at HN. As compared to HN, LN caused lower photosynthesis of BRS373 at a[CO2] and lower maximum PEPC carboxylation rate at e[CO2]. Actually, the metabolic limitation of photosynthesis by LN (Lm) was high in BRS373 at a[CO2] and slightly reduced at e[CO2]. On the other hand, Lm was increased in BRS511 and BRS655 at e[CO2]. Based on photosynthesis, the grain cultivar BRS373 was the most sensitive to LN. Although the number of leaves and of tillers and the leaf area were lower at LN than at HN for BRS373 and BRS655 after 45 days of growth, shoot biomass was not significantly affected. We found significant variation in photosynthetic responses to LN and e[CO2] among sorghum cultivars, likely associated with different patterns of nitrogen and carbon partitioning. Such findings must be considered when predicting crop performance in a changing environment.
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Affiliation(s)
- Rafael V Ribeiro
- Laboratory of Crop Physiology, Department of Plant Biology, University of Campinas (UNICAMP), Campinas SP, Brazil.
| | - Carl-Otto Ottosen
- Department of Food Science - Plant, Food and Climate, Aarhus University, Aarhus, Denmark
| | - Eva Rosenqvist
- Department of Plant and Environmental Sciences - Section of Crop Sciences, Copenhagen University, Copenhagen, Denmark
| | - Thayna Medanha
- Department of Food Science - Plant, Food and Climate, Aarhus University, Aarhus, Denmark
| | - Lamis Abdelhakim
- Department of Food Science - Plant, Food and Climate, Aarhus University, Aarhus, Denmark
| | - Eduardo C Machado
- Laboratory of Plant Physiology "Coaracy M. Franco", Center of Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas SP, Brazil
| | - Paul C Struik
- Centre for Crop Systems Analysis, Department of Plant Sciences, Wageningen University and Research, Wageningen, Netherlands
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Tofanello VR, Andrade LM, Flores-Borges DNA, Kiyota E, Mayer JLS, Creste S, Machado EC, Yin X, Struik PC, Ribeiro RV. Role of bundle sheath conductance in sustaining photosynthesis competence in sugarcane plants under nitrogen deficiency. Photosynth Res 2021; 149:275-287. [PMID: 34091828 DOI: 10.1007/s11120-021-00848-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 05/13/2021] [Indexed: 06/12/2023]
Abstract
The role of bundle sheath conductance (gbs) in sustaining sugarcane photosynthesis under nitrogen deficiency was investigated. Sugarcane was grown under different levels of nitrogen supply and gbs was estimated using simultaneous measurements of leaf gas exchange and chlorophyll fluorescence at 21% or 2% [O2] and varying air [CO2] and light intensity. Maximum rates of PEPC carboxylation, Rubisco carboxylation, and ATP production increased with an increase in leaf nitrogen concentration (LNC) from 1 to 3 g m-2. Low nitrogen supply reduced Rubisco and PEPC abundancies, the quantum efficiency of CO2 assimilation and gbs. Because of reduced gbs, low photosynthetic rates were not associated with increased leakiness under nitrogen deficiency. In fact, low nitrogen supply increased bundle sheath cell wall thickness, probably accounting for low gbs and increased estimates of [CO2] at Rubisco sites. Effects of nitrogen on expression of ShPIP2;1 and ShPIP1;2 aquaporins did not explain changes in gbs. Our data revealed that reduced Rubisco carboxylation was the main factor causing low sugarcane photosynthesis at low nitrogen supply, in contrast to the previous report on the importance of an impaired CO2 concentration mechanism under N deficiency. Our findings suggest higher investment of nitrogen into Rubisco protein would favour photosynthesis and plant performance under low nitrogen availability.
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Affiliation(s)
- Vanessa R Tofanello
- Laboratory of Crop Physiology (LCroP), Dept. Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Larissa M Andrade
- Centro de Cana, Instituto Agronômico (IAC), Ribeirão Preto, SP, Brazil
| | - Denisele N A Flores-Borges
- Laboratory of Crop Physiology (LCroP), Dept. Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Eduardo Kiyota
- Laboratory of Crop Physiology (LCroP), Dept. Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Juliana L S Mayer
- Laboratory of Crop Physiology (LCroP), Dept. Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Silvana Creste
- Centro de Cana, Instituto Agronômico (IAC), Ribeirão Preto, SP, Brazil
| | - Eduardo C Machado
- Laboratory of Plant Physiology "Coaracy M. Franco", Center for Research and Development in Ecophysiology and Biophysics, IAC, Campinas, SP, Brazil
| | - Xinyou Yin
- Centre for Crop Systems Analysis, Dept. Plant Sciences, Wageningen University & Research, Wageningen, The Netherlands
| | - Paul C Struik
- Centre for Crop Systems Analysis, Dept. Plant Sciences, Wageningen University & Research, Wageningen, The Netherlands
| | - Rafael V Ribeiro
- Laboratory of Crop Physiology (LCroP), Dept. Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil.
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Silva SF, Miranda MT, Costa VE, Machado EC, Ribeiro RV. Sink strength of citrus rootstocks under water deficit. Tree Physiol 2021; 41:1372-1383. [PMID: 33517451 DOI: 10.1093/treephys/tpab008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 01/18/2021] [Indexed: 06/12/2023]
Abstract
Carbon allocation between source and sink organs determines plant growth and is influenced by environmental conditions. Under water deficit (WD), plant growth is inhibited before photosynthesis and shoot growth tends to be more sensitive than root growth. However, the modulation of the source-sink relationship by rootstocks remains unsolved in citrus trees under WD. Citrus plants grafted on Rangpur lime are drought tolerant, which may be related to a fine coordination of the source-sink relationship for maintaining root growth. Here, we followed 13C allocation and evaluated physiological responses and growth of Valencia orange trees grafted on three citrus rootstocks (Rangpur lime, Swingle citrumelo and Sunki mandarin) under WD. As compared with plants on Swingle and Sunki rootstocks, ones grafted on Rangpur lime showed higher stomatal sensitivity to the initial variation of water availability and less accumulation of non-structural carbohydrates in roots under WD. High 13C allocation found in Rangpur lime roots indicates this rootstock has high sink demand associated with high root growth under WD. Our data suggest that Rangpur lime rootstock used photoassimilates as sources of energy and carbon skeletons for growing under drought, which is likely related to increases in root respiration. Taken together, our data revealed that carbon supply by leaves and delivery to roots are critical for maintaining root growth and improving drought tolerance, with citrus rootstocks showing differential sink strength under WD.
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Affiliation(s)
- Simone F Silva
- Laboratory of Crop Physiology, Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), PO Box 6109, Campinas 13083-970, Brazil
| | - Marcela T Miranda
- Laboratory of Crop Physiology, Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), PO Box 6109, Campinas 13083-970, Brazil
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, Agronomic Institute (IAC), PO Box 28, Campinas 13012-970, Brazil
| | - Vladimir E Costa
- Stable Isotopes Center (CIE), São Paulo State University (UNESP), Botucatu 18618-689, Brazil
| | - Eduardo C Machado
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, Agronomic Institute (IAC), PO Box 28, Campinas 13012-970, Brazil
| | - Rafael V Ribeiro
- Laboratory of Crop Physiology, Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), PO Box 6109, Campinas 13083-970, Brazil
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Ribeiro RV, Vitti KA, Marcos FCC, Souza GM, Pissolato MD, Almeida LFR, Machado EC. Proposal of an index of stability for evaluating plant drought memory: A case study in sugarcane. J Plant Physiol 2021; 260:153397. [PMID: 33721569 DOI: 10.1016/j.jplph.2021.153397] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 02/24/2021] [Accepted: 02/25/2021] [Indexed: 06/12/2023]
Abstract
Stability is a key trait for plant growth and development in a changing environment, involving homeostasis and resilience. While homeostasis refers to the maintenance of the internal structural and functional plant integrity, resilience is associated with the plant ability in returning to the initial conditions after a given disturbance. Such concepts are especially relevant for perennial and semi-perennial plants facing seasonal and frequent stress conditions. Although plant memory is closely associated with plant performance under recurrent stresses, to date, there is no study evaluating how stress memory is linked to stability under varying water conditions. Herein, we evaluated the association between drought stability and memory in sugarcane plants and proposed a new stability index to evaluate plant memory. Two datasets were analyzed, the first deals with leaf gas exchange and photochemistry of sugarcane plants grown in nutrient solution and exposed to one, two or three water deficit cycles. The second takes into account the physiological performance of sugarcane propagules obtained by vegetative propagation from plants that faced drought. To quantify sugarcane stability, we estimated the drought impact, the disturbance rate (DR), drought perturbation, and recovery rate (RR) for plants from both datasets. Drought memory - given by improved performance after previous stress events or when origin material faced drought - was detected in both datasets, changing either DR or RR. Based on these indices, we proposed the overall stability (OSt), defined as the ratio between RR and DR. While DR is associated to plant homeostasis, RR is a measure of plant resilience. Sugarcane plants exposed to three cycles of water deficit or those propagules originated from stressed plants presented the highest OSt values, showing higher RR and/or lower DR when compared to well-watered plants or to propagules from well-watered plants. Regarding the physiological traits evaluated, leaf CO2 assimilation and stomatal conductance were the most consistent variables in revealing drought stability and memory. Concluding, OSt revealed consistently patterns of response associated with plant memory, besides quantifying plant stability under stressful conditions.
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Affiliation(s)
- Rafael V Ribeiro
- Laboratory of Crop Physiology (LCroP), Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil.
| | - Karine A Vitti
- Laboratory of Plant Physiology 'Coaracy M. Franco', Center for Research and Development in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, SP, Brazil
| | - Fernanda C C Marcos
- Department of Natural Sciences and Mathematics, Limeira Technical High School, University of Campinas (Unicamp), Limeira, SP, Brazil
| | - Gustavo M Souza
- Laboratory of Plant Cognition and Electrophysiology, Department of Botany, Federal University of Pelotas (UFPel), Capão do Leão, RS, Brazil
| | - Maria D Pissolato
- Laboratory of Crop Physiology (LCroP), Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Luiz Fernando R Almeida
- Section of Plant Biology, Institute of Biosciences, São Paulo State University (Unesp), Botucatu, SP, Brazil
| | - Eduardo C Machado
- Laboratory of Plant Physiology 'Coaracy M. Franco', Center for Research and Development in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, SP, Brazil
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9
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Silveira NM, Ribeiro RV, de Morais SFN, de Souza SCR, da Silva SF, Seabra AB, Hancock JT, Machado EC. Leaf arginine spraying improves leaf gas exchange under water deficit and root antioxidant responses during the recovery period. Plant Physiol Biochem 2021; 162:315-326. [PMID: 33714146 DOI: 10.1016/j.plaphy.2021.02.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 02/23/2021] [Indexed: 06/12/2023]
Abstract
Arginine (Arg) metabolism is associated with many cellular and developmental processes in plants and proline, nitric oxide (NO) and polyamines (PAs) have a wide range of physiological functions in plants, including increased tolerance to environmental stresses. This study aimed to test the hypothesis that Arg spraying would stimulate the synthesis of proline, NO and PAs, reducing the oxidative damage caused by water deficit (WD) and increasing drought tolerance of sugarcane plants. Sugarcane plants were sprayed with water or Arg 1 mM, and subjected to WD by gradual addition of polyethylene glycol (PEG-8000) to the nutrient solution. As references, sugarcane plants were grown in nutrient solution without PEG-8000 and sprayed or not with Arg. Our data indicate that exogenous Arg supply improved leaf gas exchange during water deficit and enhanced the root antioxidative protection of sugarcane plants during the recovery period. Arg supply prevented the proline accumulation induced by water deficit and then the main pathway for proline synthesis is likely through glutamate instead of arginine. Although Arg is a substrate for NO and PAs production, supplying Arg had only slight effects in both NO and PAs levels. The spraying of amino acids capable of reducing the harmful effects of drought, such as Arg, can be an alternative to improve crop growth under field conditions.
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Affiliation(s)
- Neidiquele M Silveira
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, SP, Brazil; Laboratory of Crop Physiology (LCroP), Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil.
| | - Rafael V Ribeiro
- Laboratory of Crop Physiology (LCroP), Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Sabrina F N de Morais
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, SP, Brazil
| | - Sarah C R de Souza
- Department of Botany, Federal University of São Carlos, São Carlos, SP, Brazil
| | - Simone F da Silva
- Laboratory of Crop Physiology (LCroP), Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Amedea B Seabra
- Centre of Natural and Human Sciences, Federal University of ABC, Santo André, SP, Brazil
| | - John T Hancock
- Centre for Research in Biosciences, University of the West of England (UWE), Bristol, UK
| | - Eduardo C Machado
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, SP, Brazil
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10
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Dovis VL, Erismann NM, Machado EC, Quaggio JA, Boaretto RM, Mattos Júnior D. Biomass partitioning and photosynthesis in the quest for nitrogen- use efficiency for citrus tree species. Tree Physiol 2021; 41:163-176. [PMID: 33032323 DOI: 10.1093/treephys/tpaa126] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 09/30/2020] [Indexed: 06/11/2023]
Abstract
Optimizing the use of nitrogen (N) for food production is a major challenge in agricultural systems. The transformation of N into crop production results from intricate pathways, depending on plants, as well as the environment and fertilization regimes, which affect the N-use efficiency (NUE) of plants. In this context, lemon trees [Citrus limon (L.) Burm. f.] attain maximum harvest index at lower leaf N concentrations compared with sweet orange trees [Citrus sinensis (L.) Osbeck], and the processes governing these plant responses are not well known. The aim of this study was to understand how the higher NUE in lemons trees is constructed based on growth and biomass partitioning evaluation, as well as photochemical and biochemical characteristics of photosynthesis. To attain this goal, we evaluated growth, photosynthesis and biochemical characteristics in lemon and sweet orange trees under two different N levels over 14 months. We hypothesized that higher NUE in lemon trees is affected by plant capacity to grow with economy on nutrient resources. Furthermore, lemon trees could be more efficient in CO2 assimilation in non-limiting environmental conditions. We found that higher NUE in lemon trees was explained in part by the ability of trees to invest greater biomass in leaves instead of roots, even though this species exhibited lower relative recovery efficiency of N from the substrate than the sweet orange. We also found that lemon trees had a higher relative growth rate than sweet oranges, despite the fact that net CO2 assimilation and dark respiration were similar between the two species. As a consequence, we suggested that lemons could exhibit a lower biomass construction cost than oranges. Because lemon presented lower N concentration than sweet orange trees, the former exhibited better photosynthetic N-use efficiency (PNUE: 55-120 mmol CO2 g N-1 day-1) compared with the sweet orange (PNUE: 31-68 mmol CO2 g N-1 day-1). Lemon trees also exhibited a higher relative rate of electron transport per unit of chlorophyll (ETR/chlor: 350-850) compared with orange trees (ETR/chlor: 300-550) at both low and at high N supply. These characteristics were likely associated with transport facilitation of CO2 to the catalytic sites of plants. In fact, improved growth of lemon trees results from an array of events explained mostly by increase in leaf area and associated low construction cost despite N supply.
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Affiliation(s)
- Veronica L Dovis
- Centro de Citricultura Sylvio Moreira, Instituto Agronômico (IAC), Rod Anhanguera km 158, 13490-000, Cordeirópolis, Brasil
| | - Norma M Erismann
- Laboratório de Fisiologia Vegetal Coaracy M. Franco, Centro de Pesquisa e Desenvolvimento em Ecofisiologia e Biofísica, Instituto Agronômico (IAC), Av Doutor Theodureto de Almeida Camargo 1500, 13075-630, Campinas, Brasil
| | - Eduardo C Machado
- Laboratório de Fisiologia Vegetal Coaracy M. Franco, Centro de Pesquisa e Desenvolvimento em Ecofisiologia e Biofísica, Instituto Agronômico (IAC), Av Doutor Theodureto de Almeida Camargo 1500, 13075-630, Campinas, Brasil
| | - Jose A Quaggio
- Centro de Solos e Recursos Ambientais, Instituto Agronômico (IAC), Av Barão de Itapura 1481, 13020-902, Campinas, Brasil
| | - Rodrigo M Boaretto
- Centro de Citricultura Sylvio Moreira, Instituto Agronômico (IAC), Rod Anhanguera km 158, 13490-000, Cordeirópolis, Brasil
| | - Dirceu Mattos Júnior
- Centro de Citricultura Sylvio Moreira, Instituto Agronômico (IAC), Rod Anhanguera km 158, 13490-000, Cordeirópolis, Brasil
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11
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Cunha CP, de Abreu LSGF, Grassi MCB, Aricetti JA, Machado EC, Pereira GAAG, Oliveira JVC. Metabolic Regulation and Development of Energy Cane Setts upon Auxin Stimulus. Plant Cell Physiol 2020; 61:606-615. [PMID: 31830271 DOI: 10.1093/pcp/pcz229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Accepted: 12/07/2019] [Indexed: 06/10/2023]
Abstract
Energy cane is a bioenergy crop with an outstanding ability to bud sprouting and increasing yield in ratoon cycles even in marginal lands. Bud fate control is key to biomass production and crop profits due to vegetative propagation and tiller dependency, as well as phenotype plasticity to withstand harsh environmental conditions. During the establishment stage (plant cane cycle), energy cane has a tendency for low root:shoot ratio, which might hamper the ability to cope with stress. Auxin is known to modulate bud sprouting and stimulate rooting in sugarcane. Hence, we treated a slow and a fast bud sprouting energy cane cultivars with auxin or controls (with and without water soaking) for 6 h prior to planting and evaluate plant growth parameters and metabolic profiling using two techniques (gas chromatography with time-of-flight mass spectrometer and nuclear magnetic resonance) to characterize the effect and identify metabolite markers associated with bud inhibition and outgrowth. Auxin inhibited bud burst and promote rooting in setts changing the root:shoot ratio of plantlets. Metabolome allowed the identification of lactate, succinate and aspartate family amino acids as involved in bud fate control through the potential modulation of oxygen and energy status. Investigating environmental and biochemical factors that regulate bud fate can be incremental to other monocot species. Our study provides new insights into bud quiescence and outgrowth in cane hybrids, with the potential to leverage our understanding of yield-related traits, crop establishment and adaptation to global climate change.
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Affiliation(s)
- Camila P Cunha
- Brazilian Biorenewables National Laboratory (LNBR), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, Brazil
- Genomics and bioEnergy Laboratory, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas (Unicamp), Campinas 13083-864, Brazil
| | - Luï S Guilherme F de Abreu
- Brazilian Biorenewables National Laboratory (LNBR), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, Brazil
- Genomics and bioEnergy Laboratory, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas (Unicamp), Campinas 13083-864, Brazil
| | - Maria Carolina B Grassi
- Genomics and bioEnergy Laboratory, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas (Unicamp), Campinas 13083-864, Brazil
| | - Juliana A Aricetti
- Brazilian Biorenewables National Laboratory (LNBR), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, Brazil
| | - Eduardo C Machado
- Center for Ecophysiology and Biophysics, Agronomic Institute of Campinas (IAC), Campinas 13001-970, Brazil
| | - Gonï Alo A G Pereira
- Genomics and bioEnergy Laboratory, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas (Unicamp), Campinas 13083-864, Brazil
| | - Juliana V C Oliveira
- Brazilian Biorenewables National Laboratory (LNBR), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, Brazil
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12
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Pereira L, Bittencourt PRL, Pacheco VS, Miranda MT, Zhang Y, Oliveira RS, Groenendijk P, Machado EC, Tyree MT, Jansen S, Rowland L, Ribeiro RV. The Pneumatron: An automated pneumatic apparatus for estimating xylem vulnerability to embolism at high temporal resolution. Plant Cell Environ 2020; 43:131-142. [PMID: 31461536 DOI: 10.1111/pce.13647] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 08/16/2019] [Accepted: 08/20/2019] [Indexed: 05/29/2023]
Abstract
Xylem vulnerability to embolism represents an important trait to determine species distribution patterns and drought resistance. However, estimating embolism resistance frequently requires time-consuming and ambiguous hydraulic lab measurements. Based on a recently developed pneumatic method, we present and test the "Pneumatron", a device that generates high time-resolution and fully automated vulnerability curves. Embolism resistance is estimated by applying a partial vacuum to extract air from an excised xylem sample, while monitoring the pressure change over time. Although the amount of gas extracted is strongly correlated with the percentage loss of xylem conductivity, validation of the Pneumatron was performed by comparison with the optical method for Eucalyptus camaldulensis leaves. The Pneumatron improved the precision of the pneumatic method considerably, facilitating the detection of small differences in the (percentage of air discharged [PAD] < 0.47%). Hence, the Pneumatron can directly measure the 50% PAD without any fitting of vulnerability curves. PAD and embolism frequency based on the optical method were strongly correlated (r2 = 0.93) for E. camaldulensis. By providing an open source platform, the Pneumatron represents an easy, low-cost, and powerful tool for field measurements, which can significantly improve our understanding of plant-water relations and the mechanisms behind embolism.
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Affiliation(s)
- Luciano Pereira
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, Brazil
- Laboratory of Crop Physiology, Department of Plant Biology, Institute of Biology, P.O. Box 6109, University of Campinas (UNICAMP), Campinas, 13083-970, Brazil
| | - Paulo R L Bittencourt
- College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom
- Department of Plant Biology, Institute of Biology, P.O. Box 6109, UNICAMP, Campinas, 13083-970, Brazil
| | - Vinícius S Pacheco
- Department of Plant Biology, Institute of Biology, P.O. Box 6109, UNICAMP, Campinas, 13083-970, Brazil
| | - Marcela T Miranda
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, Brazil
| | - Ya Zhang
- Institute of Systematic Botany and Ecology, Ulm University, Ulm, 89081, Germany
| | - Rafael S Oliveira
- Department of Plant Biology, Institute of Biology, P.O. Box 6109, UNICAMP, Campinas, 13083-970, Brazil
| | - Peter Groenendijk
- Department of Plant Biology, Institute of Biology, P.O. Box 6109, UNICAMP, Campinas, 13083-970, Brazil
| | - Eduardo C Machado
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, Brazil
| | - Melvin T Tyree
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, 321004, China
| | - Steven Jansen
- Institute of Systematic Botany and Ecology, Ulm University, Ulm, 89081, Germany
| | - Lucy Rowland
- College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom
| | - Rafael V Ribeiro
- Laboratory of Crop Physiology, Department of Plant Biology, Institute of Biology, P.O. Box 6109, University of Campinas (UNICAMP), Campinas, 13083-970, Brazil
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13
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Silveira NM, Seabra AB, Marcos FC, Pelegrino MT, Machado EC, Ribeiro RV. Encapsulation of S-nitrosoglutathione into chitosan nanoparticles improves drought tolerance of sugarcane plants. Nitric Oxide 2019; 84:38-44. [DOI: 10.1016/j.niox.2019.01.004] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 12/03/2018] [Accepted: 01/06/2019] [Indexed: 02/05/2023]
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14
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Marcos FCC, Silveira NM, Marchiori PER, Machado EC, Souza GM, Landell MGA, Ribeiro RV. Drought tolerance of sugarcane propagules is improved when origin material faces water deficit. PLoS One 2018; 13:e0206716. [PMID: 30586361 PMCID: PMC6306257 DOI: 10.1371/journal.pone.0206716] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 12/11/2018] [Indexed: 12/25/2022] Open
Abstract
Drought stress can imprint marks in plants after a previous exposure, leading to plant acclimation and a permissive state that facilitates a more effective response to subsequent stress events. Such stress imprints would benefit plants obtained through vegetative propagation (propagules). Herein, our hypothesis was that the propagules obtained from plants previously exposed to water deficit would perform better under water deficit as compared to those obtained from plants that did not face stressful conditions. Sugarcane plants were grown under well-hydrated conditions or subjected to three cycles of water deficit by water withholding. Then, the propagules were subjected to water deficit. Leaf gas exchange was reduced under water deficit and the propagules from plants that experienced water deficit presented a faster recovery of CO2 assimilation and higher instantaneous carboxylation efficiency after rehydration as compared to the propagules from plants that never faced water deficit. The propagules from plants that faced water deficit also showed the highest leaf proline concentration under water deficit as well as higher leaf H2O2 concentration and leaf ascorbate peroxidase activity regardless of water regime. Under well-watered conditions, the propagules from plants that faced stressful conditions presented higher root H2O2 concentration and higher activity of catalase in roots as compared to the ones from plants that did not experience water shortage. Such physiological changes were associated with improvements in leaf area and shoot and root dry matter accumulation in propagules obtained from stressed plants. Our results suggest that root H2O2 concentration is a chemical signal associated with improved sugarcane performance under water deficit. Taken together, our findings bring a new perspective to the sugarcane production systems, in which plant acclimation can be explored for improving drought tolerance in rainfed areas.
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Affiliation(s)
- Fernanda C. C. Marcos
- Laboratory of Crop Physiology, Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Neidiquele M. Silveira
- Laboratory of Plant Physiology ‘Coaracy M. Franco’, Centre for Research and Development in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, SP, Brazil
| | | | - Eduardo C. Machado
- Laboratory of Plant Physiology ‘Coaracy M. Franco’, Centre for Research and Development in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, SP, Brazil
| | - Gustavo M. Souza
- Department of Botany, Institute of Biology, Federal University of Pelotas (UFPel), Pelotas, RS, Brazil
| | | | - Rafael V. Ribeiro
- Laboratory of Crop Physiology, Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
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15
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Santos-Silva MC, Machado EC, Wallner-Kersanach M, Camargo MG, Andrade C, Sá F, Pellizzari F. Background levels of trace elements in brown and red seaweeds from Trindade, a remote island in South Atlantic Ocean. Mar Pollut Bull 2018; 135:923-931. [PMID: 30301117 DOI: 10.1016/j.marpolbul.2018.08.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 07/27/2018] [Accepted: 08/08/2018] [Indexed: 06/08/2023]
Abstract
Trace elements in organisms are normally higher in well-developed coastal areas than on oceanic islands. Few studies have used seaweeds as their sentinels on islands. This study established background levels of trace elements (As, Cd, Pb, Zn, Cu and Hg) for four seaweed species (Dictyopteris delicatula and Canistrocarpus cervicornis, brown algae; Ceratodictyon variabile and Palisada perforata, red algae) from Trindade, an oceanic Brazilian island, and verified potential differences associated to distinct environmental conditions. Spatial differences were not detected for As, Hg and Cd in samples, although the highest concentrations of these elements were observed in brown seaweeds. The highest Zn, Pb and Cu concentrations in seaweeds from the only inhabited beach may be a signal of the onset of human footprints on this still pristine, remote island. By comparison with background described in the literature, concentrations of trace elements in seaweeds were low, thus, allowing them to be considered reference levels.
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Affiliation(s)
- M C Santos-Silva
- Universidade Federal de Rio Grande, Instituto de Oceanografia, Laboratório de Hidroquímica, Av. Itália km 8, CEP 96203-900 Rio Grande, RS, Brazil.
| | - E C Machado
- Universidade Federal de Rio Grande, Instituto de Oceanografia, Laboratório de Hidroquímica, Av. Itália km 8, CEP 96203-900 Rio Grande, RS, Brazil
| | - M Wallner-Kersanach
- Universidade Federal de Rio Grande, Instituto de Oceanografia, Laboratório de Hidroquímica, Av. Itália km 8, CEP 96203-900 Rio Grande, RS, Brazil
| | - M G Camargo
- Universidade Federal de Rio Grande, Instituto de Oceanografia, Laboratório de Organismos Bentônicos, Av. Itália km 8, CEP 96203-900 Rio Grande, RS, Brazil
| | - C Andrade
- Universidade Federal de Rio Grande, Instituto de Oceanografia, Laboratório de Hidroquímica, Av. Itália km 8, CEP 96203-900 Rio Grande, RS, Brazil
| | - F Sá
- Universidade Federal do Espírito Santo, Departamento de Oceanografia, Laboratório de Geoquímica Ambiental, Av. Fernando Ferrari 514, CEP 29075-910 Vitória, ES, Brazil
| | - F Pellizzari
- Universidade Estadual do Paraná - Campus Paranagua, Departamento de Ciências Biológicas, Laboratório de Ficologia e Qualidade de ÁguaMarinha, Comendador Correia Júnior, 117, CEP - 82203-280 Paranaguá, PR, Brazil
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16
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Marcos FCC, Silveira NM, Mokochinski JB, Sawaya ACHF, Marchiori PER, Machado EC, Souza GM, Landell MGA, Ribeiro RV. Drought tolerance of sugarcane is improved by previous exposure to water deficit. J Plant Physiol 2018; 223:9-18. [PMID: 29433084 DOI: 10.1016/j.jplph.2018.02.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 01/30/2018] [Accepted: 02/01/2018] [Indexed: 05/03/2023]
Abstract
Under field conditions, plants are exposed to cycles of dehydration and rehydration during their lifespan. In this study, we hypothesized that sugarcane plants previously exposed to cycles of water deficits will perform better than plants that have never faced water deficits when both are subjected to low water availability. Sugarcane plants were grown in a nutrient solution and exposed to one (1WD), two (2WD) or three (3WD) water deficit cycles. As the reference, plants were grown in a nutrient solution without adding polyethylene glycol. Under water deficits, leaf gas exchange was significantly reduced in 1WD and 2WD plants. However, 3WD plants showed similar CO2 assimilation and lower stomatal conductance compared to the reference plants, with increases in intrinsic water-use efficiency. Abscisic acid concentrations were lower in 3WD plants than in 1WD plants. Our data revealed root H2O2 concentration as an important chemical signal, with the highest root H2O2 concentrations found in 3WD plants. These plants presented higher root dry matter and root:shoot ratios compared to the reference plants, as well as higher biomass production when water was available. Our data suggest that sugarcane plants were able to store information from previous stressful events, with plant performance improving under water deficits. In addition, our findings provide a new perspective for increasing drought tolerance in sugarcane plants under nursery conditions.
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Affiliation(s)
- Fernanda C C Marcos
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Neidiquele M Silveira
- Laboratory of Plant Physiology "Coaracy M. Franco", Centre for Research and Development in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, SP, Brazil
| | - João B Mokochinski
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Alexandra C H F Sawaya
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Paulo E R Marchiori
- Department of Biology, Federal University of Lavras (UFLA), Lavras, MG, Brazil
| | - Eduardo C Machado
- Laboratory of Plant Physiology "Coaracy M. Franco", Centre for Research and Development in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, SP, Brazil
| | - Gustavo M Souza
- Department of Botany, Institute of Biology, Federal University of Pelotas (UFPel), Pelotas, RS, Brazil
| | - Marcos G A Landell
- Advanced Center for Technological Research of Sugarcane, Agronomic Institute (IAC), Ribeirão Preto, SP, Brazil
| | - Rafael V Ribeiro
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil.
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17
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Marchiori PER, Machado EC, Sales CRG, Espinoza-Núñez E, Magalhães Filho JR, Souza GM, Pires RCM, Ribeiro RV. Physiological Plasticity Is Important for Maintaining Sugarcane Growth under Water Deficit. Front Plant Sci 2017; 8:2148. [PMID: 29326744 PMCID: PMC5742411 DOI: 10.3389/fpls.2017.02148] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 12/04/2017] [Indexed: 05/29/2023]
Abstract
The water availability at early phenological stages is critical for crop establishment and sugarcane varieties show differential performance under drought. Herein, we evaluated the relative importance of morphological and physiological plasticity of young sugarcane plants grown under water deficit, testing the hypothesis that high phenotypic plasticity is associated with drought tolerance. IACSP95-5000 is a high yielding genotype and IACSP94-2094 has good performance under water limiting environments. Plants were grown in rhizotrons for 35 days under three water availabilities: high (soil water matric potential [Ψm] higher than -20 kPa); intermediate (Ψm reached -65 and -90 kPa at the end of experimental period) and low (Ψm reached values lower than -150 kPa). Our data revealed that morphological and physiological responses of sugarcane to drought are dependent on genotype and intensity of water deficit. In general, IACSP95-5000 showed higher physiological plasticity given by leaf gas exchange and photochemical traits, whereas IACSP94-2094 showed higher morphological plasticity determined by changes in leaf area (LA) and specific LA. As IACSP94-2094 accumulated less biomass than IACSP95-5000 under varying water availability, it is suggested that high morphological plasticity does not always represent an effective advantage to maintain plant growth under water deficit. In addition, our results revealed that sugarcane varieties face water deficit using distinct strategies based on physiological or morphological changes. When the effectiveness of those changes in maintaining plant growth under low water availability is taken into account, our results indicate that the physiological plasticity is more important than the morphological one in young sugarcane plants.
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Affiliation(s)
| | - Eduardo C. Machado
- Laboratory of Plant Physiology ‘Coaracy M. Franco’, Center for Research and Development in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, Brazil
| | | | - Erick Espinoza-Núñez
- Laboratory of Plant Physiology and Biotechnology, Department of Engineering and Agricultural Sciences, National University Toribio Rodríguez de Mendoza de Amazonas (UNTRM), Chachapoyas, Peru
| | - José R. Magalhães Filho
- Laboratory of Plant Physiology ‘Coaracy M. Franco’, Center for Research and Development in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, Brazil
| | - Gustavo M. Souza
- Department of Botany, Institute of Biology, Federal University of Pelotas, Capão do Leão, Brazil
| | - Regina C. M. Pires
- Section of Irrigation and Drainage, Center for Research and Development in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, Brazil
| | - Rafael V. Ribeiro
- Department of Plant Biology, Institute of Biology, University of Campinas, Campinas, Brazil
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18
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Marchiori PER, Machado EC, Sales CRG, Espinoza-Núñez E, Magalhães Filho JR, Souza GM, Pires RCM, Ribeiro RV. Physiological Plasticity Is Important for Maintaining Sugarcane Growth under Water Deficit. Front Plant Sci 2017; 8:2148. [PMID: 29326744 DOI: 10.3389/fpls.2017.02148/bibtex] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 12/04/2017] [Indexed: 05/25/2023]
Abstract
The water availability at early phenological stages is critical for crop establishment and sugarcane varieties show differential performance under drought. Herein, we evaluated the relative importance of morphological and physiological plasticity of young sugarcane plants grown under water deficit, testing the hypothesis that high phenotypic plasticity is associated with drought tolerance. IACSP95-5000 is a high yielding genotype and IACSP94-2094 has good performance under water limiting environments. Plants were grown in rhizotrons for 35 days under three water availabilities: high (soil water matric potential [Ψm] higher than -20 kPa); intermediate (Ψm reached -65 and -90 kPa at the end of experimental period) and low (Ψm reached values lower than -150 kPa). Our data revealed that morphological and physiological responses of sugarcane to drought are dependent on genotype and intensity of water deficit. In general, IACSP95-5000 showed higher physiological plasticity given by leaf gas exchange and photochemical traits, whereas IACSP94-2094 showed higher morphological plasticity determined by changes in leaf area (LA) and specific LA. As IACSP94-2094 accumulated less biomass than IACSP95-5000 under varying water availability, it is suggested that high morphological plasticity does not always represent an effective advantage to maintain plant growth under water deficit. In addition, our results revealed that sugarcane varieties face water deficit using distinct strategies based on physiological or morphological changes. When the effectiveness of those changes in maintaining plant growth under low water availability is taken into account, our results indicate that the physiological plasticity is more important than the morphological one in young sugarcane plants.
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Affiliation(s)
| | - Eduardo C Machado
- Laboratory of Plant Physiology 'Coaracy M. Franco', Center for Research and Development in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, Brazil
| | - Cristina R G Sales
- Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom
| | - Erick Espinoza-Núñez
- Laboratory of Plant Physiology and Biotechnology, Department of Engineering and Agricultural Sciences, National University Toribio Rodríguez de Mendoza de Amazonas (UNTRM), Chachapoyas, Peru
| | - José R Magalhães Filho
- Laboratory of Plant Physiology 'Coaracy M. Franco', Center for Research and Development in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, Brazil
| | - Gustavo M Souza
- Department of Botany, Institute of Biology, Federal University of Pelotas, Capão do Leão, Brazil
| | - Regina C M Pires
- Section of Irrigation and Drainage, Center for Research and Development in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, Brazil
| | - Rafael V Ribeiro
- Department of Plant Biology, Institute of Biology, University of Campinas, Campinas, Brazil
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19
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Silveira NM, Marcos FCC, Frungillo L, Moura BB, Seabra AB, Salgado I, Machado EC, Hancock JT, Ribeiro RV. S-nitrosoglutathione spraying improves stomatal conductance, Rubisco activity and antioxidant defense in both leaves and roots of sugarcane plants under water deficit. Physiol Plant 2017; 160:383-395. [PMID: 28417466 DOI: 10.1111/ppl.12575] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 02/10/2017] [Accepted: 02/23/2017] [Indexed: 05/08/2023]
Abstract
Water deficit is a major environmental constraint on crop productivity and performance and nitric oxide (NO) is an important signaling molecule associated with many biochemical and physiological processes in plants under stressful conditions. This study aims to test the hypothesis that leaf spraying of S-nitrosoglutathione (GSNO), an NO donor, improves the antioxidant defense in both roots and leaves of sugarcane plants under water deficit, with positive consequences for photosynthesis. In addition, the roles of key photosynthetic enzymes ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and phosphoenolpyruvate carboxylase (PEPC) in maintaining CO2 assimilation of GSNO-sprayed plants under water deficit were evaluated. Sugarcane plants were sprayed with water or GSNO 100 μM and subjected to water deficit, by adding polyethylene glycol (PEG-8000) to the nutrient solution. Sugarcane plants supplied with GSNO presented increases in the activity of antioxidant enzymes such as superoxide dismutase in leaves and catalase in roots, indicating higher antioxidant capacity under water deficit. Such adjustments induced by GSNO were sufficient to prevent oxidative damage in both organs and were associated with better leaf water status. As a consequence, GSNO spraying alleviated the negative impact of water deficit on stomatal conductance and photosynthetic rates, with plants also showing increases in Rubisco activity under water deficit.
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Affiliation(s)
- Neidiquele M Silveira
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, Brazil
| | - Fernanda C C Marcos
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Lucas Frungillo
- School of Biological Sciences, Institute of Molecular Plant Sciences, University of Edinburgh, Edinburgh, UK
| | - Bárbara B Moura
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Amedea B Seabra
- Center of Natural and Human Sciences, Federal University of ABC, Santo André, Brazil
| | - Ione Salgado
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Eduardo C Machado
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, Brazil
| | - John T Hancock
- Centre for Research in Biosciences, University of the West of England (UWE), Bristol, UK
| | - Rafael V Ribeiro
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
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Silveira NM, Hancock JT, Frungillo L, Siasou E, Marcos FCC, Salgado I, Machado EC, Ribeiro RV. Evidence towards the involvement of nitric oxide in drought tolerance of sugarcane. Plant Physiol Biochem 2017; 115:354-359. [PMID: 9277129 DOI: 10.1016/j.plaphy.2017.04.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 03/26/2017] [Accepted: 04/07/2017] [Indexed: 05/08/2023]
Abstract
Exogenous supply of nitric oxide (NO) increases drought tolerance in sugarcane plants. However, little is known about the role of NO produced by plants under water deficit. The aim of this study was to test the hypothesis that drought-tolerance in sugarcane is associated with NO production and metabolism, with the more drought-tolerant genotype presenting higher NO accumulation in plant tissues. The sugarcane genotypes IACSP95-5000 (drought-tolerant) and IACSP97-7065 (drought-sensitive) were submitted to water deficit by adding polyethylene glycol (PEG-8000) in nutrient solution to reduce the osmotic potential to -0.4 MPa. To evaluate short-time responses to water deficit, leaf and root samples were taken after 24 h under water deficit. The drought-tolerant genotype presented higher root extracellular NO content, which was accompanied by higher root nitrate reductase (NR) activity as compared to the drought-sensitive genotype under water deficit. In addition, the drought-tolerant genotype had higher leaf intracellular NO content than the drought-sensitive one. IACSP95-5000 exhibited decreases in root S-nitrosoglutathione reductase (GSNOR) activity under water deficit, suggesting that S-nitrosoglutathione (GSNO) is less degraded and that the drought-tolerant genotype has a higher natural reservoir of NO than the drought-sensitive one. Those differences in intracellular and extracellular NO contents and enzymatic activities were associated with higher leaf hydration in the drought-tolerant genotype as compared to the sensitive one under water deficit.
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Affiliation(s)
- Neidiquele M Silveira
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, SP, Brazil
| | - John T Hancock
- Centre for Research in Biosciences, University of the West of England (UWE), Bristol, UK
| | - Lucas Frungillo
- School of Biological Sciences, Institute of Molecular Plant Sciences, University of Edinburgh, Edinburgh, UK
| | - Eleni Siasou
- Centre for Research in Biosciences, University of the West of England (UWE), Bristol, UK
| | - Fernanda C C Marcos
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Ione Salgado
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Eduardo C Machado
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, SP, Brazil
| | - Rafael V Ribeiro
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil.
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21
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Cunha CP, Roberto GG, Vicentini R, Lembke CG, Souza GM, Ribeiro RV, Machado EC, Lagôa AMMA, Menossi M. Ethylene-induced transcriptional and hormonal responses at the onset of sugarcane ripening. Sci Rep 2017; 7:43364. [PMID: 28266527 PMCID: PMC5339719 DOI: 10.1038/srep43364] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 01/23/2017] [Indexed: 12/14/2022] Open
Abstract
The effects of ethephon as a sugarcane ripener are attributed to ethylene. However, the role of this phytohormone at the molecular level is unknown. We performed a transcriptome analysis combined with the evaluation of sucrose metabolism and hormone profiling of sugarcane plants sprayed with ethephon or aminoethoxyvinylglycine (AVG), an ethylene inhibitor, at the onset of ripening. The differential response between ethephon and AVG on sucrose level and sucrose synthase activity in internodes indicates ethylene as a potential regulator of sink strength. The correlation between hormone levels and transcriptional changes suggests ethylene as a trigger of multiple hormone signal cascades, with approximately 18% of differentially expressed genes involved in hormone biosynthesis, metabolism, signalling, and response. A defence response elicited in leaves favoured salicylic acid over the ethylene/jasmonic acid pathway, while the upper internode was prone to respond to ethylene with strong stimuli on ethylene biosynthesis and signalling genes. Besides, ethylene acted synergistically with abscisic acid, another ripening factor, and antagonistically with gibberellin and auxin. We identified potential ethylene target genes and characterized the hormonal status during ripening, providing insights into the action of ethylene at the site of sucrose accumulation. A molecular model of ethylene interplay with other hormones is proposed.
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Affiliation(s)
- Camila P. Cunha
- Departamento de Genética, Evolução e Bioagentes, Instituto de Biologia, Universidade Estadual de Campinas, 13083-862, Campinas, Brasil
| | - Guilherme G. Roberto
- Centro de Ecofisiologia e Biofísica, Instituto Agronômico de Campinas, 13001-970, Campinas, Brasil
| | - Renato Vicentini
- Departamento de Genética, Evolução e Bioagentes, Instituto de Biologia, Universidade Estadual de Campinas, 13083-862, Campinas, Brasil
| | - Carolina G. Lembke
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, 05508-000, São Paulo, Brasil
| | - Glaucia M. Souza
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, 05508-000, São Paulo, Brasil
| | - Rafael V. Ribeiro
- Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas, 13083-862, Campinas, Brasil
| | - Eduardo C. Machado
- Centro de Ecofisiologia e Biofísica, Instituto Agronômico de Campinas, 13001-970, Campinas, Brasil
| | - Ana M. M. A. Lagôa
- Centro de Ecofisiologia e Biofísica, Instituto Agronômico de Campinas, 13001-970, Campinas, Brasil
| | - Marcelo Menossi
- Departamento de Genética, Evolução e Bioagentes, Instituto de Biologia, Universidade Estadual de Campinas, 13083-862, Campinas, Brasil
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22
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Ribeiro RV, Machado EC, Magalhães Filho JR, Lobo AKM, Martins MO, Silveira JAG, Yin X, Struik PC. Increased sink strength offsets the inhibitory effect of sucrose on sugarcane photosynthesis. J Plant Physiol 2017; 208:61-69. [PMID: 27889522 DOI: 10.1016/j.jplph.2016.11.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 09/29/2016] [Accepted: 11/14/2016] [Indexed: 06/06/2023]
Abstract
Spraying sucrose inhibits photosynthesis by impairing Rubisco activity and stomatal conductance (gs), whereas increasing sink demand by partially darkening the plant stimulates sugarcane photosynthesis. We hypothesized that the stimulatory effect of darkness can offset the inhibitory effect of exogenous sucrose on photosynthesis. Source-sink relationship was perturbed in two sugarcane cultivars by imposing partial darkness, spraying a sucrose solution (50mM) and their combination. Five days after the onset of the treatments, the maximum Rubisco carboxylation rate (Vcmax) and the initial slope of A-Ci curve (k) were estimated by measuring leaf gas exchange and chlorophyll fluorescence. Photosynthesis was inhibited by sucrose spraying in both genotypes, through decreases in Vcmax, k, gs and ATP production driven by electron transport (Jatp). Photosynthesis of plants subjected to the combination of partial darkness and sucrose spraying was similar to photosynthesis of reference plants for both genotypes. Significant increases in Vcmax, gs and Jatp and marginal increases in k were noticed when combining partial darkness and sucrose spraying compared with sucrose spraying alone. Our data also revealed that increases in sink strength due to partial darkness offset the inhibition of sugarcane photosynthesis caused by sucrose spraying, enhancing the knowledge on endogenous regulation of sugarcane photosynthesis through the source-sink relationship.
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Affiliation(s)
- Rafael V Ribeiro
- Department of Plant Biology, Institute of Biology, University of Campinas, Campinas, SP, Brazil.
| | - Eduardo C Machado
- Laboratory of Plant Physiology "Coaracy M. Franco", Centre for Research and Development in Ecophysiology and Biophysics, Agronomic Institute, Campinas, SP, Brazil.
| | - José R Magalhães Filho
- Laboratory of Plant Physiology "Coaracy M. Franco", Centre for Research and Development in Ecophysiology and Biophysics, Agronomic Institute, Campinas, SP, Brazil.
| | - Ana Karla M Lobo
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, CE, Brazil.
| | - Márcio O Martins
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, CE, Brazil.
| | - Joaquim A G Silveira
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, CE, Brazil.
| | - Xinyou Yin
- Centre for Crop Systems Analysis, Department of Plant Sciences, Wageningen University & Research, Wageningen, The Netherlands.
| | - Paul C Struik
- Centre for Crop Systems Analysis, Department of Plant Sciences, Wageningen University & Research, Wageningen, The Netherlands.
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23
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Silveira NM, Frungillo L, Marcos FCC, Pelegrino MT, Miranda MT, Seabra AB, Salgado I, Machado EC, Ribeiro RV. Exogenous nitric oxide improves sugarcane growth and photosynthesis under water deficit. Planta 2016; 244:181-90. [PMID: 27002974 DOI: 10.1007/s00425-016-2501-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 03/03/2016] [Indexed: 05/08/2023]
Abstract
Nitric oxide (NO)-mediated redox signaling plays a role in alleviating the negative impact of water stress in sugarcane plants by improving root growth and photosynthesis. Drought is an environmental limitation affecting sugarcane growth and yield. The redox-active molecule nitric oxide (NO) is known to modulate plant responses to stressful conditions. NO may react with glutathione (GSH) to form S-nitrosoglutathione (GSNO), which is considered the main reservoir of NO in cells. Here, we investigate the role of NO in alleviating the effects of water deficit on growth and photosynthesis of sugarcane plants. Well-hydrated plants were compared to plants under drought and sprayed with mock (water) or GSNO at concentrations ranging from 10 to 1000 μM. Leaf GSNO sprayed plants showed significant improvement of relative water content and leaf and root dry matter under drought compared to mock-sprayed plants. Additionally, plants sprayed with GSNO (≥ 100 μM) showed higher leaf gas exchange and photochemical activity as compared to mock-sprayed plants under water deficit and after rehydration. Surprisingly, a raise in the total S-nitrosothiols content was observed in leaves sprayed with GSH or GSNO, suggesting a long-term role of NO-mediated responses to water deficit. Experiments with leaf discs fumigated with NO gas also suggested a role of NO in drought tolerance of sugarcane plants. Overall, our data indicate that the NO-mediated redox signaling plays a role in alleviating the negative effects of water stress in sugarcane plants by protecting the photosynthetic apparatus and improving shoot and root growth.
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Affiliation(s)
- Neidiquele M Silveira
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, SP, Brazil
| | - Lucas Frungillo
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
- School of Biological Sciences, Institute of Molecular Plant Sciences, University of Edinburgh, Edinburgh, UK
| | - Fernanda C C Marcos
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Milena T Pelegrino
- Department of Exact and Earth Sciences, Federal University of São Paulo (UNIFESP), Diadema, SP, Brazil
| | - Marcela T Miranda
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Amedea B Seabra
- Department of Exact and Earth Sciences, Federal University of São Paulo (UNIFESP), Diadema, SP, Brazil
| | - Ione Salgado
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Eduardo C Machado
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, Agronomic Institute (IAC), Campinas, SP, Brazil
| | - Rafael V Ribeiro
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil.
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24
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Silva KI, Sales CRG, Marchiori PER, Silveira NM, Machado EC, Ribeiro RV. Short-term physiological changes in roots and leaves of sugarcane varieties exposed to H2O2 in root medium. J Plant Physiol 2015; 177:93-99. [PMID: 25703773 DOI: 10.1016/j.jplph.2015.01.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 01/19/2015] [Accepted: 01/19/2015] [Indexed: 06/04/2023]
Abstract
The aim of this study was to evaluate the differential sensitivity of sugarcane genotypes to H2O2 in root medium. As a hypothesis, the drought tolerant genotype would be able to minimize the oxidative damage and maintain the water transport from roots to shoots, reducing the negative effects on photosynthesis. The sugarcane genotypes IACSP94-2094 (drought tolerant) and IACSP94-2101 (drought sensitive) were grown in a growth chamber and exposed to three levels of H2O2 in nutrient solution: control; 3 mmol L(-1) and 80 mmol L(-1). Leaf gas exchange, photochemical activity, root hydraulic conductance (Lr) and antioxidant metabolism in both roots and leaves were evaluated after 15 min of treatment with H2O2. Although, root hydraulic conductance, stomatal aperture, apparent electron transport rate and instantaneous carboxylation efficiency have been reduced by H2O2 in both genotypes, IACSP94-2094 presented higher values of those variables as compared to IACSP94-2101. There was a significant genotypic variation in relation to the physiological responses of sugarcane to increasing H2O2 in root tissues, being root changes associated with modifications in plant shoots. IACSP94-2094 presented a root antioxidant system more effective against H2O2 in root medium, regardless H2O2 concentration. Under low H2O2 concentration, water transport and leaf gas exchange of IACSP94-2094 were less affected as compared to IACSP94-2101. Under high H2O2 concentration, the lower sensitivity of IACSP94-2094 was associated with increases in superoxide dismutase activity in roots and leaves and increases in catalase activity in roots. In conclusion, we propose a general model of sugarcane reaction to H2O2, linking root and shoot physiological responses.
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Affiliation(s)
- Karina I Silva
- Graduate Program in Tropical and Subtropical Agriculture, Agronomic Institute (IAC), Campinas, SP, Brazil; Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, IAC, Campinas, SP, Brazil
| | - Cristina R G Sales
- Graduate Program in Tropical and Subtropical Agriculture, Agronomic Institute (IAC), Campinas, SP, Brazil; Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, IAC, Campinas, SP, Brazil
| | - Paulo E R Marchiori
- Graduate Program in Tropical and Subtropical Agriculture, Agronomic Institute (IAC), Campinas, SP, Brazil; Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, IAC, Campinas, SP, Brazil
| | - Neidiquele M Silveira
- Graduate Program in Tropical and Subtropical Agriculture, Agronomic Institute (IAC), Campinas, SP, Brazil; Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, IAC, Campinas, SP, Brazil
| | - Eduardo C Machado
- Laboratory of Plant Physiology "Coaracy M. Franco", Center R&D in Ecophysiology and Biophysics, IAC, Campinas, SP, Brazil
| | - Rafael V Ribeiro
- Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil.
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25
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Sales CRG, Ribeiro RV, Silveira JAG, Machado EC, Martins MO, Lagôa AMMA. Superoxide dismutase and ascorbate peroxidase improve the recovery of photosynthesis in sugarcane plants subjected to water deficit and low substrate temperature. Plant Physiol Biochem 2013; 73:326-36. [PMID: 24184453 DOI: 10.1016/j.plaphy.2013.10.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 10/10/2013] [Indexed: 05/18/2023]
Abstract
The physiological responses of C4 species to simultaneous water deficit and low substrate temperature are poorly understood, as well as the recovery capacity. This study investigated whether the effect of these abiotic stressors is cultivar-dependent. The differential responses of drought-resistant (IACSP94-2094) and drought-sensitive (IACSP97-7065) sugarcane cultivars were characterized to assess the relationship between photosynthesis and antioxidant protection by APX and SOD isoforms under stress conditions. Our results show that drought alone or combined with low root temperature led to excessive energetic pressure at the PSII level. Heat dissipation was increased in both genotypes, but the high antioxidant capacity due to higher SOD and APX activities was genotype-dependent and it operated better in the drought-resistant genotype. High SOD and APX activities were associated with a rapid recovery of photosynthesis in IACSP94-2094 plants after drought and low substrate temperature alone or simultaneously.
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Affiliation(s)
- Cristina R G Sales
- Laboratório de Fisiologia Vegetal "Coaracy M. Franco", Instituto Agronômico, CP 28, CEP 13012-970 Campinas, SP, Brazil
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26
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Angeli JLF, Trevizani TH, Ribeiro A, Machado EC, Figueira RCL, Markert B, Fraenzle S, Wuenschmann S. Arsenic and other trace elements in two catfish species from Paranaguá Estuarine Complex, Paraná, Brazil. Environ Monit Assess 2013; 185:8333-8342. [PMID: 23584825 DOI: 10.1007/s10661-013-3176-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Accepted: 03/26/2013] [Indexed: 06/02/2023]
Abstract
Concentrations of arsenic and four additional trace elements (Cu, Cr, Ni, and Zn) were determined by inductively coupled plasma-optical emission spectrometry in the muscular tissue of the yellow catfish (Cathorops spixii) and the urutu catfish (Genidens genidens) from Paranaguá Estuarine Complex, Brazil (PEC). The PEC can be characterized by an environment of high ecological and economic importance in which preserved areas of rainforest and mangroves coexist with urban activities as ports and industries. The average concentrations (in milligram per kilogram dry weight) of elements in the muscle tissue of C. spixii are as follows: Zn (31), As (17), Cu (1.17), Cr (0.62), and Ni (0.28). Similar concentrations could be found in G. genidens with exception of As: Zn (36), As (4.78), Cu (1.14), Cr (0.51), and Ni (0.14). Fish from the geographic northern rural region (Guaraqueçaba-Benito) display higher As concentrations in the muscle tissues than fish found in the south-western (urban) part of the PEC. An international comparison of muscle tissue concentrations of trace elements in fish was made. Except for Ni in C. spixii, a tendency of decrease in element concentration with increasing size (age) of the fish could be observed. According to the National Health Surveillance Agency of Brazil, levels of Cr and As exceeded the permissible limits for seafood. An estimation of the provisional tolerable weekly intake of As was calculated with 109 % for C. spixii and with 29 % for G. genidens.
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Affiliation(s)
- J L F Angeli
- Coastal and Oceanic Systems, Federal University of Paraná (CEM/UFPR), Av. Beira-Mar s/n, Pontal do Paraná, PR, Brazil.
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27
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Suzuki KN, Machado EC, Machado W, Bellido LF, Bellido AVB, Lopes RT. Radiotracer estimates of benthic activity effects on trace metal diffusion into mangrove sediments. Mar Environ Res 2013; 83:96-100. [PMID: 23174087 DOI: 10.1016/j.marenvres.2012.10.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 10/14/2012] [Accepted: 10/21/2012] [Indexed: 06/01/2023]
Abstract
Potential influences of the whole benthic organisms' activity (i.e., coupled faunal and microbial effects) on (58)Co, (51)Cr and (65)Zn diffusion into surface mangrove sediment layers (0-6 cm depth) were evaluated in 36 h experiments. Benthic activity indices (BAI) were proposed, calculated as the relative percent difference between untreated sediments and formaldehyde-treated sediments data in relation to untreated sediments data. Benthic activity was estimated as responsible for 32%-44% of total inventories within sediments, being the chromate anion spiked the less affected radiotracer, while (65)Zn was the most sensitive. Benthic activity was quantitatively evidenced as a control on trace metal diffusion into the sediments, contributing to determine the sediment role as a metal sink. This influence can also affect metal potential bioavailability, considering that recently diffused metals can be more readily available to biological uptake.
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Affiliation(s)
- K N Suzuki
- Laboratório de Instrumentação Nuclear, COPPE, Universidade Federal do Rio de Janeiro, RJ, Brazil.
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28
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Ribeiro RV, Machado EC, Habermann G, Santos MG, Oliveira RF. Seasonal effects on the relationship between photosynthesis and leaf carbohydrates in orange trees. Funct Plant Biol 2012; 39:471-480. [PMID: 32480798 DOI: 10.1071/fp11277] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Accepted: 03/26/2012] [Indexed: 06/11/2023]
Abstract
To understand the effect of summer and winter on the relationships between leaf carbohydrate and photosynthesis in citrus trees growing in subtropical conditions, 'Valencia' orange trees were subjected to external manipulation of their carbohydrate concentration by exposing them to darkness and evaluating the maximal photosynthetic capacity. In addition, the relationships between carbohydrate and photosynthesis in the citrus leaves were studied under natural conditions. Exposing the leaves to dark conditions decreased the carbohydrate concentration and increased photosynthesis in both seasons, which is in accordance with the current model of carbohydrate regulation. Significant negative correlations were found between total non-structural carbohydrates and photosynthesis in both seasons. However, non-reducing sugars were the most important carbohydrate that apparently regulated photosynthesis on a typical summer day, whereas starch was important on a typical winter day. As a novelty, photosynthesis stimulation by carbohydrate consumption was approximately three times higher during the summer, i.e. the growing season. Under subtropical conditions, citrus leaves exhibited relatively high photosynthesis and high carbohydrate levels on the summer day, as well as a high nocturnal consumption of starch and soluble sugars. A positive association was determined between photosynthesis and photoassimilate consumption/exportation, even in leaves showing a high carbohydrate concentration. This paper provides evidence that photosynthesis in citrus leaves is regulated by an increase in sink demand rather than by the absolute carbohydrate concentration in leaves.
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Affiliation(s)
- Rafael V Ribeiro
- Laboratório de Fisiologia Vegetal 'Coaracy M. Franco', Centro de Pesquisa e Desenvolvimento em Ecofisiologia e Biofísica, Instituto Agronômico, IAC, PO Box 28, 13012-970, Campinas, SP, Brazil
| | - Eduardo C Machado
- Laboratório de Fisiologia Vegetal 'Coaracy M. Franco', Centro de Pesquisa e Desenvolvimento em Ecofisiologia e Biofísica, Instituto Agronômico, IAC, PO Box 28, 13012-970, Campinas, SP, Brazil
| | - Gustavo Habermann
- Departamento de Botânica, Instituto de Biociências, Univ Estadual Paulista, UNESP, 13506-900, Rio Claro, SP, Brazil
| | - Mauro G Santos
- Departamento de Botânica, Universidade Federal de Pernambuco, 50670-901, Recife, PE, Brazil
| | - Ricardo F Oliveira
- Departamento de Ciências Biológicas, Escola Superior de Agricultura 'Luiz de Queiroz', Universidade de São Paulo, PO Box 9, 13418-900, Piracicaba, SP, Brazil
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29
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Machado EC, Yunes RA, Malheiros A, Gomez EC, Delle Monache F. Two new 11alpha,12alpha-epoxy-ursan-28,13beta-olides and other triterpenes from Cecropia catharinensis. Nat Prod Res 2008; 22:1310-6. [PMID: 19023787 DOI: 10.1080/14786410701766406] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Three new triterpenes, 2alpha-acetoxy-3beta,19alpha-dihydroxy-11alpha,12alpha-epoxy-ursan-28,13beta-olide, 3beta-acetoxy-2alpha,19alpha-dihydroxy-11alpha,12alpha-epoxy-ursan-28,13beta-olide and 2-O-acetyl-euscaphic acid together eight known triterpenes were isolated from the roots and stems of Cecropia catharinensis. Their structures were determined by detailed analysis of NMR spectra and the relative configurations established by difference nOe experiments. In addition, four flavonoid glucosides (vitexin, isovitexin, orientin and isoorientin) were found in the leaves.
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Affiliation(s)
- E C Machado
- Departamento de Quimica, Universidade Federal de Santa Catarina, Florianopolis-SC, Brazil
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Abstract
In this review we re-visit and discuss the current knowledge on ecophysiology of citrus trees, addressing the influence of environmental conditions on citrus photosynthesis. Knowledge of physiological responses of citrus trees to their surrounding environment is essential in order to improve crop production and plant development, both being consequences of appropriate horticultural management in citrus orchards. In this context, citrus photosynthesis is addressed as the primary source of carbon and energy for plant growth and development. The photosynthetic activity on both a daily and a seasonal scale is reviewed, taking into consideration the physiological aspects related to seasonal variation of photochemical and biochemical activities, stomatal conductance and leaf water potential. These aspects are treated for citrus plants growing in subtropical climates with varying environmental conditions, such as moderate to severe drought during the winter season. In addition, the possible inhibitory/stimulatory effects of carbohydrate metabolism on citrus photosynthesis are discussed with regard to the source-sink relationship. Field experimentation that enhances knowledge concerning citrus ecophysiology in subtropical climates is highlighted. Among interesting subjects to be unraveled by future research, we may point out the effects of low temperatures on citrus photosynthesis and water relations, the nature of the relationship between leaf carbohydrate content and photosynthesis, and the significance of photosynthesis in different canopy layers and positions in relation to the total carbon gain in mature citrus trees.
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Machado EC, Ferreira CLLF, Fonseca LM, Soares FM, Pereira Júnior FN. Características físico-químicas e sensoriais do queijo Minas artesanal produzido na região do Serro, Minas Gerais. Ciênc Tecnol Aliment 2004. [DOI: 10.1590/s0101-20612004000400006] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Affiliation(s)
- A F Morel
- Departamento de Química (NPPN), Universidade Federal de Santa Maria, Campus Camobi, Santa Maria, RS, Brazil
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Abstract
The isolation of the cyclopeptide alkaloids, adoutine-Y', discarine-B, discarine-E, and discarine-X, a new 14-membered cyclopeptide alkaloid from D. longispina, are reported. The structure of the new alkaloid was elucidated by spectroscopic methods and by chemical degradation.
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Affiliation(s)
- E C Machado
- Departamento de Quimica, Universidade Federal de Santa Maria, RS, Brazil
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