scholarly journals Crosstalk between Ethylene and ABA during changes in soil water content reveals a role of ACC in coffee anthesis regulation

2021 ◽  
Author(s):  
Marlon Enrique Lopez ◽  
Iasminy Silva Santos ◽  
Robert Marquez Gutierrez ◽  
Andrea Jaramillo Mesa ◽  
Carlos Henrique Cardon ◽  
...  
Keyword(s):  
Coffea Arabica ◽  
Acc Oxidase ◽  
Dry Period ◽  
Flower Buds ◽  
Environmental Stimulus ◽  
Ethylene Content ◽  
Aba Content ◽  
Coffea Arabica L ◽  
Exogenous Supply

Coffee (Coffea arabica L.) presents an asynchronous flowering regulated by endogenous and environmental stimulus, and anthesis occurs once plants are rehydrated after a period of water deficit. We evaluated the evolution of Abscisic Acid (ABA), ethylene, 1-aminocyclopropane-1-carboxylate (ACC) content, ACC oxidase (ACO) activity, and expression analysis of the Lysine Histidine Transporter 1 (LHT1) transporter, in roots, leaves and, flower buds from three coffee genotypes (Coffea arabica L. cv Oeiras, Acaua, and Semperflorens) cultivated under field conditions with two experiments. In a third field experiment, the effect of exogenous supply of ACC in coffee anthesis was evaluated. We found an increased ACC level in all tissues from the three coffee genotypes in the re-watering period just before anthesis for all tissues and high expression of the LHT1 gene in flower buds and leaves. Ethylene content and ACO activity decreased from rainy to dry period whereas ABA content increased. Higher number of opened and G6 stage flower buds were observed in the treatment with exogenous ACC. The results showed that the interaction of ABA-ACO-ethylene and intercellular ACC transport among leaves, buds, and roots in coffee favors an increased level of ACC that is most likely, involved as a modulator in coffee anthesis.

Photosynthetic acclimation to high light conditions in mature leaves of Coffea arabica L.: role of xanthophylls, quenching mechanisms and nitrogen nutrition

2000 ◽  
Vol 27 (1) ◽  
pp. 43 ◽  
Author(s):  
José C. Ramalho ◽  
Thijs L. Pons ◽  
Henri W. Groeneveld ◽  
Helena G. Azinheira ◽  
M. Antonieta Nunes
Keyword(s):  
Coffea Arabica ◽  
Nitrogen Nutrition ◽  
Net Photosynthesis ◽  
High Energy ◽  
N Fertilization ◽  
Mature Leaves ◽  
Quenching Mechanisms ◽  
N Treatment ◽  
Coffea Arabica L

Young coffee plants (Coffea arabica L. cv. Catuaí), originally from a shaded habitat, were separated in three groups to be grown under different levels of N fertilization: 0.3 mmol N supplements were given to the soil every 7 days (high N treatment, 2N), every 15 days (medium N treatment, 1N) and every 45 days (low N treatment, 0N). These plants were later exposed to a high sunlight irradiance (noon PPFD up to 1500 µmol m–2 s–1 ) for a period of 12 or 15 days. Among others, the values of electron trans-port capacity, maximum carboxylation activity, photosynthetic capacity (Amax) and several fluorescence parameters (Fv/Fm, Fv´/Fm´, qP, &phis;e) first showed a reduction (until the 4th–7th day) in all N treatments, followed by an N-dependent recovery. The 2N plants were less affected in the first few days and, at the end of the stress period, showed a better recovery for most of the studied parameters and the highest increase in the saturating PPFD for net photosynthesis and A max . The present work shows that the ability to acclimate displayed by the mature leaves of 2N plants was accompanied by an increase in energy dis-sipation mechanisms. These include an increase in the ‘high energy’ quenching and, mostly, the presence of higher contents of some xanthophylls (zeaxanthin and lutein) and carotenes, which helped to decrease the energetic overcharge in the photosystems. Pigment changes in mature leaves suggest that N can promote specific mechanisms of acclimation others than those that might be expected from a preferential partition of the element N into photosynthetic components.

scholarly journals Mites and leaf domatia: no evidence of mutualism in Coffea arabica plants

2011 ◽  
Vol 11 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Gustavo Quevedo Romero ◽  
Rodrigo Damasco Daud ◽  
Adriana Trevizoli Salomão ◽  
Luiz Fernando Martins ◽  
Reinaldo José Fazzio Feres ◽  
...  
Keyword(s):  
Coffea Arabica ◽  
Community Level ◽  
Low Density ◽  
Phytophagous Mites ◽  
Coffea Arabica L

We conducted experiments by blocking off pit-like domatia from old and new leaves of Coffea arabica L., using tiny resin drops, to investigate the role of domatia on i) mite abundance at the community level and on ii) leaf damages. More than 77% of the mites collected were predators, whereas 19 and 3.3% were omnivores and phytophages, respectively. Domatia blockage treatment had no influence either on mite abundances or leaf damages. However, predatory and omnivorous mites were more abundant on new than on the old leaves; phytophagous mites occurred at very low density and occupied only plants having open domatia. The absence of mutualism between mites and C. arabica probably occurred because the entrances of domatia were too small and did not enable the entry of fitoseid predators in these structures.

scholarly journals Studies on mineral nutrition of the coffee plant (Coffea arabica L. cv. Catuaí Vermelho): LXIV. Remobilization and re-utilization of nitrogen and potassium by normal and deficient plants

2003 ◽  
Vol 63 (3) ◽  
pp. 481-490 ◽  
Author(s):  
O. F. de Lima Filho ◽  
E. Malavolta
Keyword(s):  
Mineral Nutrition ◽  
Coffea Arabica ◽  
Coffee Plant ◽  
Flower Buds ◽  
Labelled Nitrogen ◽  
Coffee Plants ◽  
Fruit Formation ◽  
Coffea Arabica L

Remobilization and re-utilization of 15N and 85Rb labelled nitrogen and potassium reserves for new growth and fruit formation was studied under greenhouse conditions using both normal and deficient young coffee plants. It was found that K reserves are used in higher proportion than is stored N by fruits and other organs. The export of N by organs of residence in the normal plants obeyed the following proportions of the total: leaves 47%-58%, branches and flower buds 21%-27%, roots 21%-32%. The corresponding figures in the case of deficient plants were: leaves 49%-65%, branches and flower buds 21%-27%, roots 14%-25%. Re-utilization of K took place in the following proportions in the normal plants: leaves 54%-64%, branches and flower buds 20%-21%, roots 30%-41%. In K deficient plants the figures were: leaves 62%-79%, branches and flower buds 1.2%-4.4%, roots 20%-33%. In tissues formed after the initiation of flowering buds, the demand for N is met by reserves as follows: normal plants: fruits 20.6%-24.8%, leaves 15.6%-19.4%, twigs 19%-20.5%; deficient plants: fruits 43.5%-48.5%, leaves 48.1%-51.9%, twigs 46%-53%. The K needs for new tissues are met in the order: normal plants: fruits 40%-45.8%, leaves 27%-37.6%, twigs 26%-33.1%; deficient plants: fruits 65.7%-81.5%, leaves 52.6%-68.4%, twigs 62%-86.1%. Fruits represent the main sink for both N and K. Re-utilization of both elements is higher in the case of deficient plants.

Identification of abscisic acid in flower buds of Coffea arabica (L.)

Planta ◽  
1970 ◽  
Vol 94 (3) ◽  
pp. 213-219 ◽  
Author(s):  
G. Browning ◽  
G. V. Hoad ◽  
P. Gaskin
Keyword(s):  
Abscisic Acid ◽  
Coffea Arabica ◽  
Flower Buds ◽  
Coffea Arabica L

SISTEMA DE PRODUCCIÓN DE CAFÉ (Coffea arabica L.) EN LA COMUNIDAD DEL CERRO CUATE, ILIATENCO, GUERRERO

2018 ◽  
Vol 11 (10) ◽  
Author(s):  
A. Delgado-Alvarado
Keyword(s):  
Coffea Arabica ◽  
El Sistema ◽  
Coffea Arabica L

Objetivo: Analizar el proceso de producción y comercialización de café en la comunidad del Cerro Cuate, Iliatenco, en la región de la Montaña de Guerrero, México.Diseño/Metodología/aproximación: el trabajo se realizó por; 1) investigación documental), 2) selección del área de estudio, 3) Entrevista estructurada con preguntas abiertas a 22 cafeticultores, soportada con la técnica de encuesta seccional y la herramienta de cédulas de entrevistas, y 4) análisis de la información. El tamaño de muestra se definió por el método de muestreo por conveniencia, y la selección de las unidades de análisis por la técnica bola de nieve. Resultados: El sistema de producción de café que predominó fue el sistema rústico de montaña, intercalado con plátano y frutales. La máxima productividad de las plantaciones se alcanza de 5.5 a 7.5años de edad, la renovación de plantas la hacen a los 12 años. El rendimiento de café fue de 3.7 kg por planta por año. La producción del café la realizan principalmente hombres (77.3%), entre 56 y 70años de edad. La venta se realiza en la presentación de café capulín a granel a intermediarios, a la ARIC, a CAFECO, a la Unión de Ejidos y a la Organización Mixtrui.Limitaciones del estudio/implicaciones: Se da una propuesta de mejora para favorecer el proceso de producción, beneficio y comercialización del café.Hallazgos/conclusiones: Coffea arabica es el principal café que se cultiva, con las variedades Typica, Caturra, Mundo Novo, Garnica y Bourbón. Los factores que limitan su producción y calidad son faltade planeación en manejo del cultivo y no contar con asesoría técnica.

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