Table of Contents

Transcription of FLOWERING LOCUS T is tightly controlled by external and internal cues. This study reports that evolutionary conserved blocks of regulatory elements spaced at considerable distance within the promoter interact with factors regulating local chromatin structure to control transcription of the gene.

This study indicates that Lys catabolism can directly channel electrons to the mitochondrial electron transport chain in addition to sustaining the operation of the tricarboxylic acid cycle under carbon-limiting conditions.

In arbuscular mycorrhizal (AM) symbiosis, development of arbuscules, the structures responsible for mineral nutrient transfer to the plant, requires host plant functions. This work identifies two half-ABC transporters that are widely conserved in the vascular plants. Their interaction and function in the peri-arbuscular membrane is required for arbuscule development and a functional AM symbiosis.

This study reexamines the relationship between flavonoid accumulation and the growth reduction exhibited by Arabidopsis plants that are defective in lignin biosynthesis. It shows that flavonoids are not responsible for the observed growth inhibition, contrary to a previous report.

Six genes encode acyl-CoA binding proteins (ACBPs) in Arabidopsis. This study suggests a role for Arabidopsis ACBP3 as a phospholipid binding protein in the regulation of leaf senescence by modulating membrane phospholipid metabolism and the stability of autophagy-related protein ATG8.

This study describes the role of Tudor-SN in optimal stress tolerance throughout the life cycle of Arabidopsis. It finds evidence suggestive of new mechanisms regulating the metabolism of mRNAs entering the secretory pathway.

Nitrate assimilation genes in Chlamydomonas are negatively modulated by ammonium through a pathway that involves NO, cGMP, and calcium. This work shows that similar mechanisms might be operating in plants.

Conserved alternative splicing of an unusual internal targeting sequence turns the enzyme completing the peroxisomal pathway of ureide biosynthesis into a cytosolic protein with a different function.

Six genes encode acyl-CoA binding proteins (ACBPs) in Arabidopsis. This study suggests a role for Arabidopsis ACBP3 as a phospholipid binding protein in the regulation of leaf senescence by modulating membrane phospholipid metabolism and the stability of autophagy-related protein ATG8.

Conserved alternative splicing of an unusual internal targeting sequence turns the enzyme completing the peroxisomal pathway of ureide biosynthesis into a cytosolic protein with a different function.

This study indicates that Lys catabolism can directly channel electrons to the mitochondrial electron transport chain in addition to sustaining the operation of the tricarboxylic acid cycle under carbon-limiting conditions.

This study demonstrates that an RNA-dependent RNA polymerase involved in trans-acting small interfering RNA production plays a role in establishing adaxial-abaxial polarity in rice floral organs. A model is presented for anther patterning in rice.

This study describes a thioredoxin isoform (TRX z) that is crucial in plant development and functions in regulation of the plastid-encoded RNA polymerase. It shows that at least one TRX z target is regulated by light, indicative of a protein interaction module that might link plastid transcription to light signals.

This study indicates that Lys catabolism can directly channel electrons to the mitochondrial electron transport chain in addition to sustaining the operation of the tricarboxylic acid cycle under carbon-limiting conditions.

Conserved alternative splicing of an unusual internal targeting sequence turns the enzyme completing the peroxisomal pathway of ureide biosynthesis into a cytosolic protein with a different function.

This study indicates that Lys catabolism can directly channel electrons to the mitochondrial electron transport chain in addition to sustaining the operation of the tricarboxylic acid cycle under carbon-limiting conditions.

This study describes the role of Tudor-SN in optimal stress tolerance throughout the life cycle of Arabidopsis. It finds evidence suggestive of new mechanisms regulating the metabolism of mRNAs entering the secretory pathway.

This work shows that chloroplast stromal Hsp70s play a critical role in the step of protein translocation across the chloroplast envelope. It provides evidence that stromal Hsp70 functions in parallel to the Hsp93 system during protein import, making the chloroplast unique among organelles by possessing two simultaneously functioning chaperone/motor systems for protein translocation.

Environmental stresses affect the nitrate distribution between roots and shoots, and transporters that remove nitrate from the xylem sap are essential for long-distance nitrate transport. This study shows that the nitrate transporter NRT1.8 is induced by cadmium and removes nitrate from xylem vessels and furthermore establishes a correlation between nitrate allocation and cadmium tolerance.

This work describes a high-throughput screen for mutants affected in their ability to release hydrogen cyanide using the model legume Lotus japonicus. Mutants revealed unexpected specificity in the enzymes of both synthesis and degradation of cyanogenic glucosides and closely related compounds. This may offer flexibility in the production of deterrents to herbivores by this species.

This work describes a high-throughput screen for mutants affected in their ability to release hydrogen cyanide using the model legume Lotus japonicus. Mutants revealed unexpected specificity in the enzymes of both synthesis and degradation of cyanogenic glucosides and closely related compounds. This may offer flexibility in the production of deterrents to herbivores by this species.

This study demonstrates that an RNA-dependent RNA polymerase involved in trans-acting small interfering RNA production plays a role in establishing adaxial-abaxial polarity in rice floral organs. A model is presented for anther patterning in rice.

This study describes the role of Tudor-SN in optimal stress tolerance throughout the life cycle of Arabidopsis. It finds evidence suggestive of new mechanisms regulating the metabolism of mRNAs entering the secretory pathway.

Conserved alternative splicing of an unusual internal targeting sequence turns the enzyme completing the peroxisomal pathway of ureide biosynthesis into a cytosolic protein with a different function.

This work identifies ragged seedling2 as a maize homolog of Arabidopsis argonaute7 and focuses on the role of small RNA molecules in establishing leaf polarity.

This study indicates that Lys catabolism can directly channel electrons to the mitochondrial electron transport chain in addition to sustaining the operation of the tricarboxylic acid cycle under carbon-limiting conditions.

This work describes a high-throughput screen for mutants affected in their ability to release hydrogen cyanide using the model legume Lotus japonicus. Mutants revealed unexpected specificity in the enzymes of both synthesis and degradation of cyanogenic glucosides and closely related compounds. This may offer flexibility in the production of deterrents to herbivores by this species.

This work shows that chloroplast stromal Hsp70s play a critical role in the step of protein translocation across the chloroplast envelope. It provides evidence that stromal Hsp70 functions in parallel to the Hsp93 system during protein import, making the chloroplast unique among organelles by possessing two simultaneously functioning chaperone/motor systems for protein translocation.

This work describes a high-throughput screen for mutants affected in their ability to release hydrogen cyanide using the model legume Lotus japonicus. Mutants revealed unexpected specificity in the enzymes of both synthesis and degradation of cyanogenic glucosides and closely related compounds. This may offer flexibility in the production of deterrents to herbivores by this species.

This work identifies ragged seedling2 as a maize homolog of Arabidopsis argonaute7 and focuses on the role of small RNA molecules in establishing leaf polarity.

This study demonstrates that an RNA-dependent RNA polymerase involved in trans-acting small interfering RNA production plays a role in establishing adaxial-abaxial polarity in rice floral organs. A model is presented for anther patterning in rice.

This work describes a high-throughput screen for mutants affected in their ability to release hydrogen cyanide using the model legume Lotus japonicus. Mutants revealed unexpected specificity in the enzymes of both synthesis and degradation of cyanogenic glucosides and closely related compounds. This may offer flexibility in the production of deterrents to herbivores by this species.

This study reexamines the relationship between flavonoid accumulation and the growth reduction exhibited by Arabidopsis plants that are defective in lignin biosynthesis. It shows that flavonoids are not responsible for the observed growth inhibition, contrary to a previous report.

This study describes a thioredoxin isoform (TRX z) that is crucial in plant development and functions in regulation of the plastid-encoded RNA polymerase. It shows that at least one TRX z target is regulated by light, indicative of a protein interaction module that might link plastid transcription to light signals.

Environmental stresses affect the nitrate distribution between roots and shoots, and transporters that remove nitrate from the xylem sap are essential for long-distance nitrate transport. This study shows that the nitrate transporter NRT1.8 is induced by cadmium and removes nitrate from xylem vessels and furthermore establishes a correlation between nitrate allocation and cadmium tolerance.