@misc{ApriyantoCompartFettke2022,
  author    = {Apriyanto, Ardha and Compart, Julia and Fettke, J{\"o}rg},
  title     = {A review of starch, a unique biopolymer - structure, metabolism and in planta modifications},
  series = {Plant science : an international journal of experimental plant biology},
  volume    = {318},
  journal   = {Plant science : an international journal of experimental plant biology},
  publisher = {Elsevier Science},
  address   = {Amsterdam [u.a.]},
  issn      = {0168-9452},
  doi       = {10.1016/j.plantsci.2022.111223},
  pages     = {8},
  year      = {2022},
  abstract  = {Starch is a complex carbohydrate polymer produced by plants and especially by crops in huge amounts. It consists of amylose and amylopectin, which have alpha-1,4-and alpha-1,6-linked glucose units. Despite this simple chemistry, the entire starch metabolism is complex, containing various (iso)enzymes/proteins. However, whose interplay is still not yet fully understood. Starch is essential for humans and animals as a source of nutrition and energy. Nowadays, starch is also commonly used in non-food industrial sectors for a variety of purposes. However, native starches do not always satisfy the needs of a wide range of (industrial) applications. This review summarizes the structural properties of starch, analytical methods for starch characterization, and in planta starch modifications.},
  language  = {en}
}
@article{ApriyantoCompartZimmermannetal.2022,
  author    = {Apriyanto, Ardha and Compart, Julia and Zimmermann, Vincent and Alseekh, Saleh and Fernie, Alisdair and Fettke, J{\"o}rg},
  title     = {Indication that starch and sucrose are biomarkers for oil yield in oil palm (Elaeis guineensis Jacq.)},
  series = {Food chemistry},
  volume    = {393},
  journal   = {Food chemistry},
  publisher = {Elsevier},
  address   = {New York, NY [u.a.]},
  issn      = {0308-8146},
  doi       = {10.1016/j.foodchem.2022.133361},
  pages     = {11},
  year      = {2022},
  abstract  = {Oil palm (Elaeis guineensis Jacq.) is the most productive oil-producing crop per hectare of land. The oil that accumulates in the mesocarp tissue of the fruit is the highest observed among fruit-producing plants. A comparative analysis between high-, medium-, and low-yielding oil palms, particularly during fruit development, revealed unique characteristics. Metabolomics analysis was able to distinguish accumulation patterns defining of the various developmental stages and oil yield. Interestingly, high- and medium-yielding oil palms exhibited substantially increased sucrose levels compared to low-yielding palms. In addition, parameters such as starch granule morphology, granule size, total starch content, and starch chain length distribution (CLD) differed significantly among the oil yield categories with a clear correlation between oil yield and various starch parameters. These results provide new insights into carbohydrate and starch metabolism for biosynthesis of oil palm fruits, indicating that starch and sucrose can be used as novel, easy-to-analyze, and reliable biomarker for oil yield.},
  language  = {en}
}
@article{SinghCompartALRawietal.2022,
  author    = {Singh, Aakanksha and Compart, Julia and AL-Rawi, Shadha Abduljaleel and Mahto, Harendra and Ahmad, Abubakar Musa and Fettke, J{\"o}rg},
  title     = {LIKE EARLY STARVATION 1 alters the glucan structures at the starch granule surface and thereby influences the action of both starch-synthesizing and starch-degrading enzymes},
  series = {The plant journal},
  volume    = {111},
  journal   = {The plant journal},
  number    = {3},
  publisher = {Wiley-Blackwell},
  address   = {Oxford},
  issn      = {0960-7412},
  doi       = {10.1111/tpj.15855},
  pages     = {819 -- 835},
  year      = {2022},
  abstract  = {For starch metabolism to take place correctly, various enzymes and proteins acting on the starch granule surface are crucial. Recently, two non-catalytic starch-binding proteins, pivotal for normal starch turnover in Arabidopsis leaves, namely, EARLY STARVATION 1 (ESV1) and its homolog LIKE EARLY STARVATION 1 (LESV), have been identified. Both share nearly 38\% sequence homology. As ESV1 has been found to influence glucan phosphorylation via two starch-related dikinases, alpha-glucan, water dikinase (GWD) and phosphoglucan, water dikinase (PWD), through modulating the surface glucan structures of the starch granules and thus affecting starch degradation, we assess the impact of its homolog LESV on starch metabolism. Thus, the 65-kDa recombinant protein LESV and the 50-kDa ESV1 were analyzed regarding their influence on the action of GWD and PWD on the surface of the starch granules. We included starches from various sources and additionally assessed the effect of these non-enzymatic proteins on other starch-related enzymes, such as starch synthases (SSI and SSIII), starch phosphorylases (PHS1), isoamylase and beta-amylase. The data obtained indicate that starch phosphorylation, hydrolyses and synthesis were affected by LESV and ESV1. Furthermore, incubation with LESV and ESV1 together exerted an additive effect on starch phosphorylation. In addition, a stable alteration of the glucan structures at the starch granule surface following treatment with LESV and ESV1 was observed. Here, we discuss all the observed changes that point to modifications in the glucan structures at the surface of the native starch granules and present a model to explain the existing processes.},
  language  = {en}
}