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The appearance of the new generation in higher plants is ensured by the presence of viable seeds in the mother plant. A good number of signaling networks is necessary to provoke germination. Phytohormones play a key role in all stages of seed development, maturation, and dormancy acquisition. The dormancy of some seeds can be relieved through a tightly regulated process called after-ripening (AR) that occurs in viable seeds stored in a dry environment. Although ABA is directly involved in dormancy, recent data suggest that auxin also plays a preponderant role. On the other hand, the participation of reactive oxygen species (ROS) in the life of the seed is becoming increasingly confirmed. ROS accumulate at different stages of the seed’s life and are correlated with a low degree of dormancy. Thus, ROS increase upon AR and dormancy release. In the last decade, the advances in the knowledge of seed life have been noteworthy. In this Special Issue, those processes regulated by DOG1, auxin, and nucleic acid modifications are updated. Likewise, new data on the effect of alternating temperatures (AT) on dormancy release are here present. On the one hand, the transcriptome patterns stimulated at AT that encompasses ethylene and ROS signaling and metabolism together with ABA degradation were also discussed. Finally, it was also suggested that changes in endogenous γ-aminobutyric acid (GABA) may prevent seed germination.

Research & information: general --- Biology, life sciences --- chestnut --- GABA --- seed germination --- carbon metabolism --- nitrogen metabolism --- DOG1 --- seed dormancy --- ABA --- ethylene --- clade-A PP2C phosphatase (AHG1 --- AHG3) --- after-ripening --- asDOG1 --- heme-group --- association mapping --- climate adaptation --- germination --- genomics --- legumes --- Medicago --- plasticity --- physical dormancy --- DNA methylation --- oxidation --- RNA stability --- seed vigour --- ROS --- primary dormancy --- ABI3 --- auxin --- YUC --- PIN --- ARF --- endosperm --- integuments --- AGL62 --- PRC2 --- RNA-Seq --- dormancy termination --- gene expression --- antioxidants --- ethylene signaling --- environmental signals --- long-lived mRNA --- monosomes --- auxin and ABA --- alternating temperatures --- chestnut --- GABA --- seed germination --- carbon metabolism --- nitrogen metabolism --- DOG1 --- seed dormancy --- ABA --- ethylene --- clade-A PP2C phosphatase (AHG1 --- AHG3) --- after-ripening --- asDOG1 --- heme-group --- association mapping --- climate adaptation --- germination --- genomics --- legumes --- Medicago --- plasticity --- physical dormancy --- DNA methylation --- oxidation --- RNA stability --- seed vigour --- ROS --- primary dormancy --- ABI3 --- auxin --- YUC --- PIN --- ARF --- endosperm --- integuments --- AGL62 --- PRC2 --- RNA-Seq --- dormancy termination --- gene expression --- antioxidants --- ethylene signaling --- environmental signals --- long-lived mRNA --- monosomes --- auxin and ABA --- alternating temperatures

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• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

The appearance of the new generation in higher plants is ensured by the presence of viable seeds in the mother plant. A good number of signaling networks is necessary to provoke germination. Phytohormones play a key role in all stages of seed development, maturation, and dormancy acquisition. The dormancy of some seeds can be relieved through a tightly regulated process called after-ripening (AR) that occurs in viable seeds stored in a dry environment. Although ABA is directly involved in dormancy, recent data suggest that auxin also plays a preponderant role. On the other hand, the participation of reactive oxygen species (ROS) in the life of the seed is becoming increasingly confirmed. ROS accumulate at different stages of the seed’s life and are correlated with a low degree of dormancy. Thus, ROS increase upon AR and dormancy release. In the last decade, the advances in the knowledge of seed life have been noteworthy. In this Special Issue, those processes regulated by DOG1, auxin, and nucleic acid modifications are updated. Likewise, new data on the effect of alternating temperatures (AT) on dormancy release are here present. On the one hand, the transcriptome patterns stimulated at AT that encompasses ethylene and ROS signaling and metabolism together with ABA degradation were also discussed. Finally, it was also suggested that changes in endogenous γ-aminobutyric acid (GABA) may prevent seed germination.

chestnut --- GABA --- seed germination --- carbon metabolism --- nitrogen metabolism --- DOG1 --- seed dormancy --- ABA --- ethylene --- clade-A PP2C phosphatase (AHG1 --- AHG3) --- after-ripening --- asDOG1 --- heme-group --- association mapping --- climate adaptation --- germination --- genomics --- legumes --- Medicago --- plasticity --- physical dormancy --- DNA methylation --- oxidation --- RNA stability --- seed vigour --- ROS --- primary dormancy --- ABI3 --- auxin --- YUC --- PIN --- ARF --- endosperm --- integuments --- AGL62 --- PRC2 --- RNA-Seq --- dormancy termination --- gene expression --- antioxidants --- ethylene signaling --- environmental signals --- long-lived mRNA --- monosomes --- auxin and ABA --- alternating temperatures

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Polyamines are small organic compounds found in all living organisms. In recent years, there have been many exciting advances in our understanding of plant polyamines, such as the determination of the biosynthetic and catabolic pathways of plant polyamines and the identification of the roles that plant polyamines play in cellular processes. This Special Issue contains six original research papers and three review articles, providing valuable insights and information for future polyamine-related research.

Research & information: general --- Biology, life sciences --- polyamine oxidase --- norspermidine --- thermospermine --- Selaginella lepidophylla --- Arabidopsis thaliana mutant --- polyamines --- spermidine --- nonsense-mediated decay --- no-go decay --- non-stop decay --- quality control --- translation --- copper amine oxidases --- H2O2 --- ROS --- ABA --- stomatal closure --- back conversion pathway --- polyamine catabolism --- stress response --- terminal catabolism pathway --- Ranunculus biternatus --- Ranunculus pseudotrullifolius --- Ranunculus moseleyi --- secondary metabolite variation --- amines --- quercetins --- natural populations --- environment --- redundancy --- sub-Antarctic plants --- Arabidopsis --- phloem --- rice --- spermine --- xylem --- nitrogen metabolism --- abiotic and biotic stress --- hydrogen peroxide --- antioxidant machinery --- heat shock proteins --- heat stress --- polyamine oxidases --- PA acetylation --- PA oxidation --- PA back-conversion --- putrescine --- tomato --- spermidine synthase --- fruit shape --- cell division --- cell expansion --- copper amine oxidase --- polyamine oxidase --- norspermidine --- thermospermine --- Selaginella lepidophylla --- Arabidopsis thaliana mutant --- polyamines --- spermidine --- nonsense-mediated decay --- no-go decay --- non-stop decay --- quality control --- translation --- copper amine oxidases --- H2O2 --- ROS --- ABA --- stomatal closure --- back conversion pathway --- polyamine catabolism --- stress response --- terminal catabolism pathway --- Ranunculus biternatus --- Ranunculus pseudotrullifolius --- Ranunculus moseleyi --- secondary metabolite variation --- amines --- quercetins --- natural populations --- environment --- redundancy --- sub-Antarctic plants --- Arabidopsis --- phloem --- rice --- spermine --- xylem --- nitrogen metabolism --- abiotic and biotic stress --- hydrogen peroxide --- antioxidant machinery --- heat shock proteins --- heat stress --- polyamine oxidases --- PA acetylation --- PA oxidation --- PA back-conversion --- putrescine --- tomato --- spermidine synthase --- fruit shape --- cell division --- cell expansion --- copper amine oxidase