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; Morgano, Marco Tomasi; Stapf, Dieter; Nick, Peter

doi:10.1016/j.indcrop.2021.113550

Cited by 13 publications

(12 citation statements)

References 56 publications

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“…Nevertheless, key differences between sweet and grain sorghum were found in regulatory genes and sugar metabolism genes, which are likely to play major roles in stem sugar accumulation, despite the high genetic similarity at structural levels [25]. Both, sweet and grain sorghums accumulated sugar in higher concentrations in central internodes, while accumulating more weight in the basal internodes [26]. Compared to the grain types, sweet genotypes double or even triple the sugar concentration in all internodes, with the highest amounts of sugar in the central internodes.…”

Section: Introductionmentioning

confidence: 99%

Mining Sorghum Biodiversity—Potential of Dual-Purpose Hybrids for Bio-Economy

et al. 2021

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Sweet, grain, and dual-purpose sorghums differ in a number of important traits, including biomass production, total solutes in the stem juice, and sugar accumulation across the stem. Ten dual-purpose hybrids, two sweet genotypes, and two grain landraces of sorghums were characterized under temperate environmental conditions to determine their potential for bioethanol production. Five sorghum hybrids (Ganymed, Hannibal, Tarzan, Merlin, and Zerberus) performed better with respect to cane yield, juice yield, potential sugar, and ethanol yields compared to sweet and grain genotypes. While the sweet genotype KIT1 produced the highest sugar concentration in the stem, the lowest concentration was produced by the grain landrace Razinieh. The study showed that plant height, leaf number, leaf weight, cane yield, and juice yield were positively correlated with the sugar yield in fresh stalk. Sugar accumulation was higher in the central internodes of all genotypes. Clustering analysis showed that sweet genotypes are located more closely to dual-purpose hybrids than grain landraces. We discuss the results with respect to the potential of dual-purpose sorghum hybrids for bio-economy in Germany.

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Section: Introductionmentioning

confidence: 99%

Mining Sorghum Biodiversity—Potential of Dual-Purpose Hybrids for Bio-Economy

et al. 2021

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“…It is mandatory, therefore, to comprehend how plants respond to P i starvation during the vegetative growth stage, and to design strategies to breed varieties with better P i uptake and use efficiency. For the current study, we took advantage of the morpho-physiological and molecular differences between a sweet (Della) and a grain (Razinieh) variety of sorghum [26][27][28][29], in order to understand how different sorghum types respond to P i starvation. We analysed morpho-physiological parameters, expression of key genes, and chemical speciation of phosphorous.…”

Section: Resultsmentioning

confidence: 99%

“…Although showing a reduction in leaf growth, the sweet variety Della retains anthocyanin accumulation, even at higher levels than Razinieh. This has to be seen on the background of the higher level of sugar in the shoot of Della [29] compared to Razinieh [26][27][28]. Since sugars accumulate under P i starvation [36], it is straightforward to assume that glycosylation of the phenolic moiety and import to the vacuole are crucial for this pigment response.…”

Section: Phosphorus Starvation Enhances Primary Root Elongation and Inhibits Shoot Growthmentioning

confidence: 99%

“…This study made use of a grain sorghum (Sorghum bicolor L. cv 'Razinieh') variety, and a sweet sorghum (Sorghum bicolor L. cv 'Della') variety. Razinieh is an improved Syrian landrace [26][27][28], while Della is a sweet sorghum variety, developed from a cross of Dale and ATx622 by Bob Harrison, Virginia Polytechnic Institute, and released in December 1991 [79].…”

Section: Plant Materialsmentioning

confidence: 99%

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Starve to Sustain—An Ancient Syrian Landrace of Sorghum as Tool for Phosphorous Bio-Economy?

Kanbar

Mirzai

Abuslima

et al. 2021

IJMS

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Phosphorus (P) is an essential macronutrient, playing a role in developmental and metabolic processes in plants. To understand the local and systemic responses of sorghum to inorganic phosphorus (Pi) starvation and the potential of straw and ash for reutilisation in agriculture, we compared two grain (Razinieh) and sweet (Della) sorghum varieties with respect to their morpho-physiological and molecular responses. We found that Pi starvation increased the elongation of primary roots, the formation of lateral roots, and the accumulation of anthocyanin. In Razinieh, lateral roots were promoted to a higher extent, correlated with a higher expression of SbPht1 phosphate transporters. Infrared spectra of straw from mature plants raised to maturity showed two prominent bands at 1371 and 2337 cm−1, which could be assigned to P-H(H2) stretching vibration in phosphine acid and phosphinothious acid, and their derivates, whose abundance correlated with phosphate uptake of the source plant and genotype (with a higher intensity in Razinieh). The ash generated from these straws stimulated the shoot elongation and root development of the rice seedlings, especially for the material derived from Razinieh raised under Pi starvation. In conclusion, sorghum growing on marginal lands has potential as a bio-economy alternative for mineral phosphorus recycling.

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“…Studies demonstrated that the phenotypical variation between grain and sweet sorghum is a reflection of the genetic differences which occur due to gene variation (~ 1,500 genes), SNPs, insertion/deletion (indels) segments, and the presence/absence variations (PAVs) in genetic regions. The majority of these genetic variations reside in genes with adverse biological functions and stress responses [52][53][54]. This can be noted in the variation observed in the simple sequence repeats (SSR) found in some of the lectins genomic sequences interms of numbers, length and sequence composition, and can be used for plant selection and identification of domesticated cultivors [55].…”

Section: Discussionmentioning

confidence: 99%

Genome-wide screening of lectin putative genes from Sorghum bicolor L., distribution in QTLs and a probable implications of lectins in abiotic stress tolerance

2022

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Background Sorghum bicolor is one of the most important crops worldwide with the potential to provide resilience when other economic staples might fail against the continuous environmental changes. Many physiological, developmental and tolerance traits in plants are either controlled or influenced by lectins; carbohydrate binding proteins. Hence, we aimed at providing a comprehensive in silico account on sorghum’s lectins and study their possible implication on various desired agronomical traits. Results We have searched sorghum’s genome from grain and sweet types for lectins putative genes that encode proteins with domains capable of differentially binding carbohydrate moieties and trigger various physiological responses. Of the 12 known plant lectin families, 8 were identified regarding their domain architectures, evolutionary relationships, physiochemical characteristics, and gene expansion mechanisms, and they were thoroughly addressed. Variations between grain and sweet sorghum lectin homologs in term of the presence/absence of certain other joint domains like dirigent and nucleotide-binding adaptor shared by APAF-1, R-proteins, and CED-4 (NB-ARC) indicate a possible neofunctionalization. Lectin sequences were found to be preferentially overrepresented in certain quantitative trait loci (QTLs) related to various traits under several subcategories such as cold, drought, salinity, panicle/grain composition, and leaf morphology. The co-localization and distribution of lectins among multiple QTLs provide insights into the pleiotropic effects that could be played by one lectin gene in numerous traits. Conclusion Our study offers a first-time inclusive details on sorghum lectins and their possible role in conferring tolerance against abiotic stresses and other economically important traits that can be informative for future functional analysis and breeding studies.

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

Cited by 13 publications

References 56 publications

Mining Sorghum Biodiversity—Potential of Dual-Purpose Hybrids for Bio-Economy

Mining Sorghum Biodiversity—Potential of Dual-Purpose Hybrids for Bio-Economy

Starve to Sustain—An Ancient Syrian Landrace of Sorghum as Tool for Phosphorous Bio-Economy?

Genome-wide screening of lectin putative genes from Sorghum bicolor L., distribution in QTLs and a probable implications of lectins in abiotic stress tolerance

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