Sugars levels of four sugarcane genotypes in different stem portions during the maturation phase

Abstract

Maturation is a characteristic of sugarcane plant (Saccharum spp.) and even when grown under the same soil and climate conditions the varieties differ on the maturation curve. Thus, studies that allow establishing maturation curves of different sugarcane genotypes in the local soil and climate may indicate the proper harvesting period to ensure better quality of the raw material. This study aimed to analyze the levels of soluble sugars during the maturation phase and assess the technological and productivity indexes of four irrigated sugarcane genotypes in the region of Rio Largo, Alagoas. The experiment was conducted in randomized blocks in a 4 x 2 x 5 factorial: four genotypes (RB92579, RB98710, RB99395 and RB961003), two stem portions (internodes 1-4 and internodes 5-8) and five seasons (82, 49, 25, 13 and 3 days before harvesting), each treatment with three replications. Internodes 1-4 showed the highest levels of reducing sugars, while the largest accumulation of sucrose and total soluble solids occurred in internodes 5-8. RB99395 genotype showed more stability in the sugar levels during sugarcane maturation, which can indicate early maturation and high agricultural yield.

Metabolite Profiles of Sugarcane Culm Reveal the Relationship Among Metabolism and Axillary Bud Outgrowth in Genetically Related Sugarcane Commercial Cultivars

“…Sugarcane is capable of accumulating impressive amounts of sucrose in its stems, in a very complex and dynamic process characterized by a continuous cycle of synthesis and degradation ( Whittaker and Botha, 1997 ; Zhu et al, 1997 ; Botha and Black, 2000 ; Rose and Botha, 2000 ), which involves various enzymes and their isoforms. There is a gradient of sucrose accumulation along the stem, with younger internodes containing less sucrose than older internodes ( Zhu et al, 1997 ; Pereira et al, 2017 ). Interestingly, the stored carbon in the form of sucrose is used for bud outgrowth and formation of a new sugarcane plant ( O’Neill et al, 2012 ).…”

A systematic high-throughput phenotyping assay for sugarcane stalk quality characterization by near-infrared spectroscopy

“…Sugarcane stalk consists of water, sugar, and fiber. These three significant components result in dynamic variations in sugarcane stalks among different genotypes, growth periods, and meteorological conditions [ 9 ]. The dry mass of cane stalks is composed of sugar and fiber, so the sugar concentration is therefore influenced by partitioning of carbon between the two [ 10 ].…”

Nutritional status and technological quality of sugarcane due to increasing gypsum doses

“…In recent years, it has gained global interest as a raw material for the production of biofuels, since its energy balance is potentially positive (Smeets et al, 2009;Losordo et al, 2016). In the global scenario, Brazil stands out as the largest producer, whose production system is one of the most competitive in the world, mainly due to the development of national science and technology for the production of sugarcane, extraction and industrialization of the juice, use of sugar-alcohol waste in the fertilization of cane fields, and electric power generation (Clemente et al, 2017;Oliveira et al, 2017;Pereira et al, 2017). Despite the promising scenario, currently, the sugarcane crop faces a serious agricultural and industrial crisis, marked by low yields of sugarcane plantations, especially in northeastern Brazil.…”