A Study of Water Dynamics and Phenology in Plant Parts of ‘Eva’ Apple Trees Grown under Winter Conditions in Southern Brazil

Barreto, Caroline Farias; Abreu, E. F. M.; Moreno, M.A.; Farias, Roseli Mello; Yamamoto, Robson Ryu; Mello-Farias, Paulo; Herter, Flávio Gilberto; Chaves, Agnaldo Rodrigues de Melo; Lamela, Carlos

doi:10.9734/jeai/2017/37927

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“…The variable plant behavior between the years of study may be associated with weather factors, such as the variable cold accumulation, which often interferes with the intensity of dormancy stage the anger plant reaches often does not even reach endodormancy [32]. The water availability and water accumulation in the tissues can also influence the dormancy overcoming ability, as well as the bud sprouting velocity in the different parts of the plant [33]. In addition to the environmental factors to which the plants are exposed, the application of growth regulators, such as ANA (Nafetalene Acetic Acid) and BA (Benzyladenine), to promote the adjustment of the fruit load, or even the production obtained in the previous production season, may have a direct influence on the quality of the buds, accumulation of reserves and return flowering in the next growing season [34].…”

Section: Percentage Of Leaf Fall In 'Fuji Suprema' Apple Plants Submimentioning

confidence: 99%

Induction of Senescence and Foliar Abscission in Apple Trees with the Use of Abscisic Acid

Esperança

Petri

Rossi

et al. 2019

JEAI

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Aims: Evaluate the effects of different concentrations of abscisic acid (ABA) on adult plants of productive age of ‘Daiane’ and ‘Fuji Suprema’, to follow the ecophysiological effects and their efficiency in inducing leaf senescence, sprouting and productivity, in the Midwestern region of the state of Santa Catarina. Study Design: The experiment was arranged in a randomized block design with six replications. Place and Duration of Study: The experiment was carried out in the municipality of Caçador, Brazil (latitude 26º50’07” S, longitude 50º58’32” W, altitude 969 meters), during the growing seasons of 2013/2014 and 2014/2015. Methodology: The apple fruit tree were submitted to the following treatments: 1) Control (without treatment), 2) abscisic acid 750 mg L-1, 3) abscisic acid 750 + 750 mg L-1, 4) abscisic acid 1500 mg L-1 and 5) abscisic acid 1500 + 1500 mg L-1. ABA applications in the first year were carried out on May 2, 2013 in treatments 2, 3, 4, and 5, and after 11 days (05/13/13) the plants of treatments 3 and 5 were sprayed again. In the second year, ABA applications were carried out on May 6 and 15, 2014, following the same application methodology described for the first year. As the source of abscisic acid (ABA) the commercial product ProTone® (20% i.a.) was used, without the use of adjuvant. The exogenous application of ABA was effective in promoting the senescence and leaf fall of the ‘Daiane’ and ‘Fuji Suprema’ cultivars. In the 2013/2014 season, the concentration of 750 mg L-1 was enough to induce 100% leaf fall in 'Daiane' plants. However, a difference was observed between the concentrations of ABA used. There was a difference between concentrations and number of applications. Lower concentrations were efficient and deflated as much as the higher concentration. The application of ABA induces the abscission of apple leaves in early autumn in 'Daiane' and 'Fuji Suprema' apple plants. The ABA does not affect shoots of axillary buds and anticipates the beginning of shoots.

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Section: Percentage Of Leaf Fall In 'Fuji Suprema' Apple Plants Submimentioning

confidence: 99%

Induction of Senescence and Foliar Abscission in Apple Trees with the Use of Abscisic Acid

Esperança

Petri

Rossi

et al. 2019

JEAI

View full text Add to dashboard Cite

show abstract

A Study of Water Dynamics and Phenology in Plant Parts of ‘Eva’ Apple Trees Grown under Winter Conditions in Southern Brazil

Cited by 1 publication

References 0 publications

Induction of Senescence and Foliar Abscission in Apple Trees with the Use of Abscisic Acid

Induction of Senescence and Foliar Abscission in Apple Trees with the Use of Abscisic Acid

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