Chilling stress applied to broccoli transplants of different age affects yield of the plants cultivated in summer

Abstract

Grabowska A., Kunicki E., Kalisz A., Wojciechowska R., Leja M., Sękara A., 2014. Chilling stress applied to broccoli transplants of different age affects yield of the plants cultivated in summer. Hort. Sci. (Prague), 41: 71-79.Broccoli is native to moderate climatic zone, and summer cultivation of this species in Central Europe conditions leads to a decrease of heads quality. The aim of present investigations was application of dark-chilling at 2°C for 1 and 2 weeks to transplants of various ages to enhance its tolerance against adverse conditions in the field and to modify the yield potential. Broccoli cv. Monaco F 1 can be recommended for summer production in Central Europe, because of high yield potential and lack of buttoning in high temperature conditions. Dark-chilling of 4-week-old transplants for two weeks significantly increased the yield, but also the percentage of stems with hollows as compared to control. Significant advancing of harvest together with prolongation of the harvest's period can be achieved by the use of 6 and 8-week-old transplants chilled for 2 weeks. Dark-chilling of 10-week-old transplants resulted in forming of smallest heads with the highest percentage of hollow stems.

Response of Broccoli Transplants to LED Light during Short and Long-Term Storage

“…This suggests that a temperature of 4 • C could inhibit cell division in the apical meristem but due to water intake, the expansion of stem and leaf cells was not stopped. A greater temperature reduction with the simultaneous use of more blue and UV light in the spectrum during broccoli storage could cause oxidative stress [9,10].…”

“…Therefore, the question is whether seedlings can be transported and/or stored with the use of a system-that is designed to maintain the proper storage conditions and simultaneously do not require a large energy input to function. In the last few decades, many research studies have been conducted on the storage of vegetable seedlings at low temperatures, which inhibits the growth of plants, but also allows the preservation of good quality seedlings and high yield of good quality [9,10]. Research has focused on optimizing the environment in terms of photoperiod, light intensity, and spectral quality as well as the composition of the gaseous atmosphere (CO 2 and O 2 concentrations), which, combined with the right storage temperature, can improve the ability to store seedlings without causing deterioration [11].…”

Efecto de la distancia de plantación sobre la calidad de la pella y el rendimiento en dos híbridos de brócoli (Brassica oleracea var.Italica Plenk) en el Valle de Lerma (Salta)

“…Algunos trabajos se refieren al comportamiento de variedades de brócoli como respuesta a la variación de las distancias de plantación o trasplante (Checa et al, 2012;Fraire Cordero et al, 2010;Limachi Choque, 2011;Dev, 2012;Perez Olvera et al,2014;Mamaní Rojas, 2014;Maroto & Baixauli Soria, 2017) y otros a diferentes manejos culturales relacionados al espaciamiento de las plantas y su incidencia sobre el rendimiento y calidad de la pella de esta especie (Farnham & Björkman, 2011;Ngullie & Biswas, 2014;Kumar et al;2017Gonzalez García,J. et al, 2016, Lozano et al, 2017 la fertilización (Puenayan et al, 2010), la producción bajo cubierta (Thapa et al, 2013;Casasierra-Posada & Rojas, 2009), el manejo de los almácigos o semilleros (Paniagua-Pardo et al, 2015;Rizzardi & Bouzo, 2014), la producción estival del brécol y su comportamiento ecológico (Farnham & Björkman, 2011;Rosero-Bustos, 2015;Vega, 2010;Grabowska et al, 2014). El objetivo del presente trabajo fue evaluar si la distancia de plantación (15 y 30 cm) afecta la calidad de la cabeza y el rendimiento de dos híbridos de brócoli [Formoso (Alliance) y Legacy (Seminis)] en las condiciones agroclimáticas del Valle de Lerma (Salta).…”

Alterations in Chlorophyll a Fluorescence and Pigments Concentration in the Leaves of Cauliflower and Broccoli Transplants Subjected to Chilling

“…We also expect the differences between broccoli and cauliflower crops in response to stress, which should be helpful to estimate their sensitivity to low temperature. Results published by Długosz-Grochowska et al (2012) and Grabowska et al (2014) suggest that broccoli is relatively tolerant to chilling temperatures, while the response of cauliflower plants to environmental conditions is stronger in comparison to broccoli, and the species seems to be more affected by extreme thermal factors (Diputado, 1989;Olesen and Grevsen, 2000). However, direct comparative studies of broccoli and cauliflower responses to low temperature treatment are scarce and very difficult to achieve.…”