Source–sink relationships during early crop development influence earliness of sugar accumulation in sugarcane

Abstract

The dynamics of tiller production and senescence modify early source–sink relationships in sugarcane and the thermal time from crop emergence to the end of the tiller mortality phase appears to be a key trait in identifying earliness of sucrose accumulation.

Regulation of morphogenesis and process of agricultural crop production by means of phytohormone analogues and modifiers of their action

“…It is known that structural polysaccharides make up the bulk of the plant and in critical periods of growth and development can be incorporated in metabolism, probably providing a photosynthesis-independent flow of carbohydrates to the sink centers [22,79]. The possibility of re-structuring the cell walls confirms the study of their structure in Brachypodium distachyon, which showed clear changes in the number and structure of polymers: cellulose, lignin, pectin and hemicelluloses.…”

“…It is believed that the evolutionary prerequisite for the ejection of the sourcesink system is the formation of the vascular system, which provides not only the vertical position of the plant in space, but also the transport, mechanical and spare functions in the plant. As the phloem is the major transport pathway for aminoacids and organic nitrogen from source to sink [10,79], it eliminates the possibility of regulating the source-sink pressure gradient by altering the activity of transport proteins that mediate cellular export and import through the apoplast. Such transport is effective in highly specialized sieve-like elements of the phloem, even in the tallest trees [8,54].…”

“…effective mechanism for influencing the onset of vegetative growth and its duration, as well as the activity of deposition and the dynamics of the amount of sucrose in the stem [79]. It is known that the regulation of key mechanisms of source-sink system occurs mainly due to the optimization of the signaling pathway of trehalose-6phosphate, which regulates the release of carbohydrates, which is key to many features of crop yields [65, 77,79].…”

Impact of Leifsonia xyli subsp. xyli titer on nutritional status, and metabolism of sugar cane

“…Plants with high Lxx titers also showed the highest sucrose, maltose in the leaf and maltose in the culm, which occurred by reduced sugar partitioning to tillers production(Garcia et al, 2021). Symptomatic plants presented higher biomass in main culm, which caused higher sugars storage in parenchyma of the culm due to the lower tillers biomass(Garcia et al, 2021;Saez et al, 2019). However, the plants with high Lxx titers showed a decrease in trehalose content on the leaf when compared to low Lxx titers.…”