Abstract
ABSTRACT Brazil’s low garlic productivity is attributed, mainly to the lateral shoot growth, a physiological anomaly characterized by early lateral shoot growth of cloves in noble group garlic cultivars. Considering the aforementioned information, the aim was to evaluate the occurrence of lateral shoot growth and productivity characteristics in garlic plants, cv. Chonan, subject to herbicide chemical stress. In order to do so, an experiment was conducted in outlining randomized blocks in a 3x5 factorial scheme, constituted by three herbicides (paraquat 500 g ha-1; ammonium gluphosinate 400 g ha-1 and glyphosate 720 g ha-1) and five subdoses (0, 5, 10, 15 and 20% of the minimum recommended dose of each herbicide). The electron transport rates (ETR) were evaluated after herbicide application, as well as the culture’s morphological and productive characteristics. The chemical stress caused by herbicides paraquat, ammonium gluphosinate and glyphosate in underdoses of 25, 40 and 36 i.a. ha-1, respectively, was efficient in reducing the electron transport rate and the lateral shoot growth of the Chonan garlic cultivar, and also technically viable in increasing the productivity of commercial bulbs.
Highlights
A baixa produtividade de alho no Brasil é atribuída, principalmente, ao pseudoperfilhamento, anomalia fisiológica caracterizada pela brotação antecipada dos bulbilhos em cultivares de alho do grupo nobre
O estresse químico dos herbicidas paraquat, amônio glufosinato e glyphosate nas subdoses de 25, 40 e 36 i.a. ha-1, respectivamente, foi eficiente na redução da taxa de transporte de elétrons e do pseudoperfilhamento da cultivar de alho Chonan, assim como tecnicamente viável no aumento da produtividade de bulbos comerciais
In Brazil’s South, concentrated production is highlighted in the state of Santa Catarina, where cultivation happens with a greater frequency in small family agriculture properties, with low productivity of commercial standard bulbs
Summary
A baixa produtividade de alho no Brasil é atribuída, principalmente, ao pseudoperfilhamento, anomalia fisiológica caracterizada pela brotação antecipada dos bulbilhos em cultivares de alho do grupo nobre. O estresse químico dos herbicidas paraquat, amônio glufosinato e glyphosate nas subdoses de 25, 40 e 36 i.a. ha-1, respectivamente, foi eficiente na redução da taxa de transporte de elétrons e do pseudoperfilhamento da cultivar de alho Chonan, assim como tecnicamente viável no aumento da produtividade de bulbos comerciais. This genetic-physiologically caused anomaly is characterized by the early lateral shoot growth of cloves, which reduces the culture productivity, and depreciates the product, compromising its commercial value (Souza & Casali, 1986) In this sense, several factors have been related to the lateral shoot growth in garlic, such as photoperiod (Wu et al, 2015, 2016), temperature (Wu et al, 2015, 2016), the cultivar (Resende et al, 2011, 2013; Wu et al, 2016), excessive nitrogen (Marouelli et al, 2002; Trani et al, 2008), irrigation (Marouelli et al, 2002), as well as the regulatory action of gibereline hormones (Vieira et al, 2014; Wu et al, 2016) and jasmonic acid (Wu et al, 2016). The stress in garlic plants induces the production of abscisic acid, which acts as a subdue to giberelines produced during vernalization, in addition to helping the formation of larger bulbs due to the translocation of solutes (Taiz & Zeiger, 2013)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
