CARBOHYDRATE CONTENT AND DEVELOPMENT OF STRAWBERRY TRANSPLANTS FROM RIO GRANDE DO SUL AND IMPORTED

Carine Cocco,Luis Eduardo Corrêa Antunes,Michél Aldrighi Gonçalves,Carlos Reisser Junior,Anderson Carlos Marafon

doi:10.1590/0100-29452016581

Abstract

ABSTRACT Obtaining high yields in strawberry crop requires the use of transplants with high sanitary and physiological quality. Thus, the present study aimed to evaluate the effect of the origin of strawberry transplants on quality, carbohydrate content and subsequent development and field production. Treatments covered four transplant origins: Argentina, Chile, Chuí (Rio Grande do Sul, Brazil) and São Francisco de Paula (Rio Grande do Sul, Brazil) and two cultivars (Camarosa and Camino Real) in experimental design of randomized blocks with four replicates, conducted between April and December 2010. Carbohydrate content in crown and roots was evaluated, as well as the growth and development of transplants and plant yield. Regardless of cultivar and origin of transplants, crown diameter values exceeding 8 mm were considered the minimum standard internationally established. Transplants propagated in Chui showed 100% mortality 20 days after planting, while losses were not recorded in Argentina and Chile transplants. Camarosa transplants from Chile showed the highest content of total soluble sugars in reserve organs, while higher starch content was obtained in Argentinean transplants. The high carbohydrate content in reserve organs in Argentina and Chile transplants led to greater fruit production.

Highlights

In the conventional strawberry production system (Fragaria x ananassa Duch.) in Brazil, bare root transplants are generally used for crop establishment (ANTUNES; PERES, 2013)
In order to obtain high yields, one of the essential prerequisites is the use of vigorous transplants with high physiological and phytosanitary quality (COCCO et al, 2011, MENZEL; SMITH et al, 2012), capable of providing high survival rate after transplantation, rapid vegetative growth and development of new organs such as flowers and fruits
At the end of the summer and beginning of autumn, the reduction of temperatures and photoperiod favors the accumulation of carbohydrates in reserve organs, resulting in increased thickness of crown and roots (PERTUZÉ et al, 2006; MENZEL; SMITH, 2012)

Summary

Introduction

In the conventional strawberry production system (Fragaria x ananassa Duch.) in Brazil, bare root transplants are generally used for crop establishment (ANTUNES; PERES, 2013). In order to obtain high yields, one of the essential prerequisites is the use of vigorous transplants with high physiological and phytosanitary quality (COCCO et al, 2011, MENZEL; SMITH et al, 2012), capable of providing high survival rate after transplantation, rapid vegetative growth and development of new organs such as flowers and fruits. At the end of the summer and beginning of autumn, the reduction of temperatures and photoperiod favors the accumulation of carbohydrates in reserve organs, resulting in increased thickness of crown and roots (PERTUZÉ et al, 2006; MENZEL; SMITH, 2012). The low nocturnal temperatures during this period decrease the plant energy expenditure due to the reduction in cellular respiration, increasing the liquid photosynthesis and, leading to greater carbohydrate accumulation (KIRSCHBAUM et al, 2012; PALENCIA et al 2013)

Objectives

Methods

Results