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Pheophytin Pheophorbide Hydrolase (Pheophytinase) Is Involved in Chlorophyll Breakdown during Leaf Senescence in Arabidopsis[W][OA]
TLDR
Pheophytinase (PPH), a chloroplast-located and senescence-induced hydrolase widely distributed in algae and land plants, is identified and proposed that the sequence of early chlorophyll catabolic reactions be revised.
Complete DNA sequences of the plastid genomes of two parasitic flowering plant species, Cuscuta reflexa and Cuscuta gronovii
TLDR
Overall, the comparative genomic analysis of plastid DNA from parasitic plants indicates a bias towards a simplification of the plastids gene expression machinery as a consequence of an increasing dependency on the host plant.
Plant senescence and crop productivity
TLDR
In several crops, the stay-green phenotype is observed to be associated with a higher drought resistance and a better performance under low nitrogen conditions, and a coincidence of drought stress resistance and stay- green trait is observed in many transgenic plants.
Leaf senescence and nutrient remobilisation in barley and wheat.
Extensive studies have been undertaken on senescence processes in barley and wheat and their importance for the nitrogen use efficiency of these crop plants. During the senescence processes, proteins
A Plant Locus Essential for Phylloquinone (Vitamin K1) Biosynthesis Originated from a Fusion of Four Eubacterial Genes*
TLDR
Gene fusion, duplication, and fission events adapted a eubacterial multienzymatic system to the metabolic requirements of plants and enabled a metabolic branch from the phylloquinone biosynthesis route to independently regulate the synthesis of salicylic acid required for plant defense.
Comparative survey of plastid and mitochondrial targeting properties of transcription factors in Arabidopsis and rice
TLDR
It is proposed that dually targeted transcription factors might be involved in the communication between the nucleus and the organelles in plant cells and how recent results on the physical interaction between the organlles and the nucleus could have significance for the regulation of the localization of these proteins.
Whirly1 in chloroplasts associates with intron containing RNAs and rarely co-localizes with nucleoids
TLDR
The results of RIP-chip experiments showed that barley Whirly1 as its maize orthologue associates with a set of intron containing plastid RNAs, suggesting that plastids-located Whirlies1 functions primarily in RNA metabolism rather than as a DNA binding protein.
Functional and molecular changes in the photosynthetic apparatus during senescence of flag leaves from field‐grown barley plants
TLDR
There were differences in the kinetics of the declines in the levels of transcripts coding for components of the photosynthetic apparatus, whereas levels of psbA and petC transcripts did not decrease until 16 d post-anthesis, among several senescence-related processes.
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