Phytotoxicity and leaf anatomy of young coffee plants subjected to herbicides exclusively and in associations

2020 ◽  
Vol 15 ◽  
pp. 1-10
Author(s):  
Rafael Jorge de almeida ◽  
Adenilson Henrique Gonçalves ◽  
Pedro Menicucci Netto ◽  
Arthur Henrique Cruvinel Carneiro ◽  
Dalyse Toledo Castanheira ◽  
...  
Keyword(s):  
Leaf Anatomy ◽  
Coffee Plants

scholarly journals PHYTOTOXICITY AND GROWTH OF COFFEE PLANTS AS A FUNCTION OF THE APPLICATION OF HERBICIDE 2,4-D

2019 ◽  
Vol 14 (4) ◽  
pp. 438
Author(s):  
Giovani Belutti Voltolini ◽  
Dalyse Toledo Castanheira ◽  
Larissa Cocato Da Silva ◽  
Ademilson De Oliveira Alecrim ◽  
Tiago Teruel Rezende ◽  
...  
Keyword(s):  
Weed Control ◽  
Leaf Anatomy ◽  
Chemical Control ◽  
Coffea Arabica ◽  
Block Design ◽  
Control Methods ◽  
Collar Region ◽  
Randomized Block Design ◽  
Coffee Plants ◽  
Herbicide Drift

Weed control in coffee is of great importance for there is a great interference, standing out the competition for water, light and nutrients. Among the control methods, chemical control is highlighted as a function of its efficiency. However, the incorrect application of herbicides may imply the occurrence of drift, resulting in damage to coffee development due to phytotoxicity. In this context, the objective of this study was to evaluate the symptoms and phytotoxicity effects caused by the herbicide 2,4-D drift on the morphological, physiological and anatomical characteristics of coffee seedlings. The experiment was carried out in a greenhouse with ‘Topázio MG1190’ coffee seedlings (<em>Coffea arabica</em> L.), planted in 11-L pots. A randomized block design with four treatments and four replicates was used. The treatments were: 0%; 10%; 25% and 50% of the recommended commercial dose of 2,4-D (2.5 L.ha<sup>-1</sup>). Each plot consisted of three plants. The evaluations were performed at 74 days after implantation. Morphological, physiological, anatomical and phytotoxicity symptoms were evaluated as a function of the simulated herbicide drift. Coffee seedlings intoxicated by the herbicide 2,4-D presented hyponastic, chlorosis, shriveling and leaf anomalies. In the orthotropic branch, bending was observed in its extension, besides thickening in the collar region; in the plagiotropic branch, cracking was observed. Herbicide drift negatively affects the development of coffee plants. The coffee physiology was affected as a function of herbicide drift, but without damage to the leaf anatomy.

The leaf anatomy of the species ofCochlospermum Kunth (Cochlospermaceae) in West Africa

1991 ◽  
Vol 102 (3-4) ◽  
pp. 183-187
Author(s):  
O. T. Ogundipe ◽  
O. A. Olatunji
Keyword(s):  
West Africa ◽  
Leaf Anatomy

Observations on the leaf-anatomy, pollen, cytology and propagation of Calibanus hookeri (Lem.) Trelease

Bradleya ◽  
1983 ◽  
Vol 1 (1) ◽  
pp. 25-32 ◽  
Author(s):  
Margaret A. T. Johnson ◽  
Rowena M. O. Gale
Keyword(s):  
Leaf Anatomy

Variability in Leaf Anatomy in Primitive and Commercial Stocks of Cotton 1

Crop Science ◽  
1974 ◽  
Vol 14 (4) ◽  
pp. 595-598 ◽  
Author(s):  
P. R. Morey ◽  
J. E. Quisenberry ◽  
B. Roark
Keyword(s):  
Leaf Anatomy

scholarly journals New species and records of Trichoderma isolated as mycoparasites and endophytes from cultivated and wild coffee in Africa

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
María del Carmen H. Rodríguez ◽  
Harry C. Evans ◽  
Lucas M. de Abreu ◽  
Davi M. de Macedo ◽  
Miraine K. Ndacnou ◽  
...  
Keyword(s):  
New Species ◽  
Cloud Forest ◽  
Elongation Factor ◽  
Classical Biological Control ◽  
Hemileia Vastatrix ◽  
Translation Elongation ◽  
Coffee Leaf Rust ◽  
Novel Taxa ◽  
Coffee Plants ◽  
Wild Coffee

AbstractA survey for species of the genus Trichoderma occurring as endophytes of Coffea, and as mycoparasites of coffee rusts (Hemileia), was undertaken in Africa; concentrating on Cameroon and Ethiopia. Ninety-four isolates of Trichoderma were obtained during this study: 76 as endophytes of healthy leaves, stems and berries and, 18 directly from colonized rust pustules. A phylogenetic analysis of all isolates used a combination of three genes: translation elongation factor-1α (tef1), rpb2 and cal for selected isolates. GCPSR criteria were used for the recognition of species; supported by morphological and cultural characters. The results reveal a previously unrecorded diversity of Trichoderma species endophytic in both wild and cultivated Coffea, and mycoparasitic on Hemileia rusts. Sixteen species were delimited, including four novel taxa which are described herein: T. botryosum, T. caeruloviride, T. lentissimum and T. pseudopyramidale. Two of these new species, T. botryosum and T. pseudopyramidale, constituted over 60% of the total isolations, predominantly from wild C. arabica in Ethiopian cloud forest. In sharp contrast, not a single isolate of Trichoderma was obtained using the same isolation protocol during a survey of coffee in four Brazilian states, suggesting the existence of a ‘Trichoderma void’ in the endophyte mycobiota of coffee outside of Africa. The potential use of these African Trichoderma isolates in classical biological control, either as endophytic bodyguards—to protect coffee plants from Hemileia vastatrix, the fungus causing coffee leaf rust (CLR)—or to reduce its impact through mycoparasitism, is discussed, with reference to the on-going CLR crisis in Central America.

Unmanned aerial vehicle to evaluate frost damage in coffee plants

2021 ◽  
Author(s):  
Diego Bedin Marin ◽  
Gabriel Araújo e Silva Ferraz ◽  
Felipe Schwerz ◽  
Rafael Alexandre Pena Barata ◽  
Rafael de Oliveira Faria ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Frost Damage ◽  
Aerial Vehicle ◽  
Coffee Plants

scholarly journals Selenium biofortification enhances ROS scavenge system increasing yield of coffee plants

2021 ◽  
Vol 209 ◽  
pp. 111772
Author(s):  
Matheus Pereira de Brito Mateus ◽  
Renan Francisco Rimoldi Tavanti ◽  
Tauan Rimoldi Tavanti ◽  
Elcio Ferreira Santos ◽  
Arshad Jalal ◽  
...  
Keyword(s):  
Scavenge System ◽  
Coffee Plants

scholarly journals Transformation of coffee (Coffea Arabica L. cv. Catimor) with the cry1ac gene by biolistic, without the use of markers

2010 ◽  
Vol 70 (2) ◽  
pp. 387-393 ◽  
Author(s):  
Z De Guglielmo-Cróquer ◽  
I. Altosaar ◽  
M. Zaidi ◽  
A. Menéndez-Yuffá
Keyword(s):  
Reporter Genes ◽  
Leaf Miner ◽  
Selection Marker ◽  
Marker Genes ◽  
Cry1ac Gene ◽  
Reverse Transcription Pcr ◽  
Gus Reporter ◽  
Leucoptera Coffeella ◽  
Coffee Plants ◽  
Coffea Arabica L

The transformation of coffee plantlets with the cry1ac gene of Bacillus thuringiensis was achieved by biolistic using either the whole pUBC plasmid or only the ubi-cry1ac-nos genetic cassette. The cry1ac gene was inserted into coffee plants in order to confer resistance to the leaf miner Leucoptera coffeella, an insect responsible for considerable losses in coffee crops. Bearing in mind that the genetic cassettes used for this study lack reporter genes and/or selection marker genes, the parameters for the transformation procedure by biolistic were previously standardised with a plasmid carrying the gus reporter gene. The presence of the cry1ac gene in young plantlet tissues was determined by PCR, Southern blot and reverse transcription-PCR. Our results show that the obtainment of viable coffee plantlets, transformed by bombardment with the cry1ac gene and without selection markers nor reporter genes, is feasible.

Sign in / Sign up

Export Citation Format

Share Document