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Sweet versus grain sorghum: Differential sugar transport and accumulation are linked with vascular bundle architecture

Kanbar, Adnan; Shakeri, Ehsan; Alhajturki, Dema; Riemann, Michael; Bunzel, Mirko; Tomasi Morgano, Marco; Stapf, Marco; Stapf, Dieter; Nick, Peter

Abstract (englisch):
Sorghum (Sorghum bicolor L. Moench) is globally produced as a source of food, fiber, feed, and fuel. Sweet and
grain sorghums differ in a number of important traits, including biomass production, stem sugar and juice
accumulation. In this study, a sweet (KIT1) and a grain (Razinieh) genotype of sorghum were used to investigate
major differences between sweet and grain sorghum in terms of stem-sugar accumulation. Differences in stem
component traits such as internodes, stem anatomy, but also transcripts of key sucrose transporter genes and
their response to salt stress were compared. While internodal traits were similar, differences on anatomical level
were observed in internodes. Sugar accumulation was highest in the central internodes in both genotypes.
However, phloem to xylem cross areas in internodes was correlated with the amount of sugar stored in stem.
Sugar accumulation increased significantly under salinity in both genotypes. The expression of sugar-transporter
genes SbSUT1, SbSUT2, and SbSUT6 was higher in the leaves of KIT1 under normal conditions, but significantly
increased in the stem of KIT1 under salinity stress. ... mehr

DOI: 10.1016/j.indcrop.2021.113550
Zugehörige Institution(en) am KIT Institut für Technische Chemie (ITC)
Botanisches Institut (BOTANIK)
Institut für Angewandte Biowissenschaften (IAB)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0926-6690, 1872-633X
KITopen-ID: 1000132305
HGF-Programm 38.05.01 (POF IV, LK 01) Anthropogenic Carbon Cycle
Erschienen in Industrial crops and products
Verlag Elsevier
Band 167
Seiten Article no: 113550
Schlagwörter Sorghum (grain, sweet), Sugar accumulation, Vascular architecture, Salinity, SbSUT genes
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