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排序方式: 共有717条查询结果,搜索用时 15 毫秒
711.
Margaret Bezrutczyk Nora R Zllner Colin P S Kruse Thomas Hartwig Tobias Lautwein Karl Khrer Wolf B Frommer Ji-Yun Kim 《The Plant cell》2021,33(3):531
Leaves are asymmetric, with different functions for adaxial and abaxial tissue. The bundle sheath (BS) of C3 barley (Hordeum vulgare) is dorsoventrally differentiated into three types of cells: adaxial structural, lateral S-type, and abaxial L-type BS cells. Based on plasmodesmatal connections between S-type cells and mestome sheath (parenchymatous cell layer below bundle sheath), S-type cells likely transfer assimilates toward the phloem. Here, we used single-cell RNA sequencing to investigate BS differentiation in C4 maize (Zea mays L.) plants. Abaxial BS (abBS) cells of rank-2 intermediate veins specifically expressed three SWEET sucrose uniporters (SWEET13a, b, and c) and UmamiT amino acid efflux transporters. SWEET13a, b, c mRNAs were also detected in the phloem parenchyma (PP). We show that maize has acquired a mechanism for phloem loading in which abBS cells provide the main route for apoplasmic sucrose transfer toward the phloem. This putative route predominates in veins responsible for phloem loading (rank-2 intermediate), whereas rank-1 intermediate and major veins export sucrose from the PP adjacent to the sieve element companion cell complex, as in Arabidopsis thaliana. We surmise that abBS identity is subject to dorsoventral patterning and has components of PP identity. These observations provide insights into the unique transport-specific properties of abBS cells and support a modification to the canonical phloem loading pathway in maize. 相似文献
712.
Brit Mollenhauer Frederick DuBois Bowman Daniel Drake Jimmy Duong Kaj Blennow Omar El‐Agnaf Leslie M. Shaw Jennifer Masucci Peggy Taylor Robert M. Umek Jill M. Dunty Chris L. Smith Erik Stoops Hugo Vanderstichele Adrian W. Schmid Marc Moniatte Jing Zhang Niels Kruse Hilal A. Lashuel Charlotte Teunissen Tanja Schubert Kuldip D. Dave Samantha J. Hutten Henrik Zetterberg 《Journal of neurochemistry》2019,149(1):126-138
713.
714.
Daniela Kruse Stefan Six Reinhard Krämer Andreas Burkovski 《Biotechnology letters》2001,23(5):401-404
Threonine uptake in Escherichia coli wild-type and in threonine-producing strains decreased throughout threonine production. In contrast to previously published results, the SstT uptake system is not the sole serine/threonine permease in E. coli, since a novel transport system was detected in an sstT deletion strain. 相似文献
715.
F H Herrmann T Kruse M Wehnert G Vogel K Wulff 《Folia haematologica (Leipzig, Germany : 1928)》1988,115(4):489-493
The application of the intragenic probe F8 e16-19 of factor VIII gene is reported for carrier detection in preparation of prenatal diagnosis of hemophilia A in a family at risk. The proband's mother is heterozygous for the Bcl I polymorphism and prenatal diagnosis can be offered to this family. 相似文献
716.
Pyruvate dehydrogenase (PDH) E1α is a key component in the PDH complex which catalyzes the oxidative decarboxylation of pyruvate
to acetyl-CoA. Defects in the gene coding for PDH E1α (PDHA1) are associated with a variety of clinical symptoms, often of
a severe character. In the present study, the segregation of three polymorphic CA repeats located in PDHA1 was followed in
the 40 CEPH reference pedigrees. Using these data, multipoint linkage analysis was carried out, refining the genetic location
of PDHA1. The 16-point map presented locates PDHA1 in an approximately 3-cM interval between DXS999 and DXS365 with odds of
more than 1000 : 1. From known physical localizations of the flanking marker loci, PDHA1 could be regionally assigned to Xp22.1-p22.2.
The information provided should be of value in clinical settings.
Received: 10 May 1996 相似文献
717.
Gottfried Vauk Felix Gräfe H. Kumerloeve und Heinz Kruse 《Journal of Ornithology》1962,103(1):108-110
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