Species-specific microsymbiont discrimination mediated by a receptor kinase.

Host range specificity is a prominent feature of the legume-rhizobial symbiosis. and are two closely related species that engage in root nodule symbiosis with legume plants of the genus, but certain species exhibit selectivity in their interactions with the two rhizobial species. We have identified a receptor-like kinase, which can discriminate between the two bacterial species, acting as a genetic barrier against infection by most strains.

Assembly of the Complete Mitochondrial Genome of Revealed That Two Pairs of Repetitive Elements Mediated the Recombination of the Genome.

is a potential new crop species that has both food and medicinal (antinociceptive activity) properties. However, comprehensive genomic research on is still lacking, particularly concerning its organelle genome. In this study, was studied to sequence the mitochondrial genome (mitogenome) and to ascertain the assembly, informational content, and developmental expression of the mitogenome.

Plastome variations reveal the distinct evolutionary scenarios of plastomes in the subfamily Cereoideae (Cactaceae).

Background: The cactus family (Cactaceae) has been reported to have evolved a minimal photosynthetic plastome size, with the loss of inverted-repeat (IR) regions and NDH gene suites. However, there are very limited genomic data on the family, especially Cereoideae, the largest subfamily of cacti.

Results: In the present study, we assembled and annotated 35 plastomes, 33 of which were representatives of Cereoideae, alongside 2 previously published plastomes.

Paired receptors mediate broad-spectrum resistance to nodulation by carrying a species-specific gene.

Plants have evolved the ability to distinguish between symbiotic and pathogenic microbial signals. However, potentially cooperative plant-microbe interactions often abort due to incompatible signaling. The () locus in the legume blocks tissue invasion and root nodule induction by many strains of the nitrogen-fixing symbiont .

The complete plastomes of red fleshed pitaya () and three related species: insights into gene losses, inverted repeat expansions and phylogenomic implications.

Unlabelled: is a genus of perennial shrub from the family Cactaceae, and some of them play an important role in the food industry, pharmaceuticals, cosmetics and medicine. To date, there are few reports on plastomes, which limits our understanding of this genus. Here, we have reported the complete plastomes of four species (, , and and carried out a comprehensive comparative analysis.

Analysis of the complete chloroplast genomes of and (Lamiaceae).

Linn. is a perennial herb with about 300 species. This genus has high medicinal value and many are used in Traditional Chinese Medicine (TCM).

The Impacts of Domestication and Breeding on Nitrogen Fixation Symbiosis in Legumes.

Legumes are the second most important family of crop plants. One defining feature of legumes is their unique ability to establish a nitrogen-fixing root nodule symbiosis with soil bacteria known as rhizobia. Since domestication from their wild relatives, crop legumes have been under intensive breeding to improve yield and other agronomic traits but with little attention paid to the belowground symbiosis traits.

Genetic and Physical Localization of the Gene Controlling Leaf Pigmentation Pattern in .

In , some ecotypes form a black or purple stain in the middle of adaxial leaf surface due to accumulation of anthocyanins. However, this morphological marker is missing in some other ecotypes, although anthocyanin biosynthesis pathway is not disrupted. Genetic analysis indicated that the lack of the leaf spot of anthocyanins accumulation is a dominant trait, which is controlled by a single gene, Genetic mapping indicated that the gene was delimited to a 280 kb-region on Chromosome 7.

Genetic localization of the SPC gene controlling pod coiling direction in Medicago truncatula.

Background: Handedness in plants introduced by helical growth of organs is frequently observed, and it has fascinated plant scientists for decades. However, the genetic control of natural handedness has not been revealed. In the model legume Medicago truncatula, pods can be coiled in a clockwise or anti-clockwise manner, providing a model for genetic analysis of plant handedness.

Antagonistic regulation of axillary bud outgrowth by the BRANCHED genes in tobacco.

As a key integrator of shoot branching, BRANCHED 1 (BRC1) coordinates and is orchestrated by endogenous and environmental signals involved in the regulation of axillary bud outgrowth. In the present study, we characterized the regulatory roles of five BRC gene members in tobacco (Nicotiana tabacum L.) using CRISPR site-directed mutagenesis and overexpression assays.

Microsymbiont discrimination mediated by a host-secreted peptide in .

The legume-rhizobial symbiosis results in the formation of root nodules that provide an ecological niche for nitrogen-fixing bacteria. However, plant-bacteria genotypic interactions can lead to wide variation in nitrogen fixation efficiency, and it is not uncommon that a bacterial strain forms functional (Fix) nodules on one plant genotype but nonfunctional (Fix) nodules on another. Host genetic control of this specificity is unknown.

Isolation and characterization of a novel cDNA encoding methyl jasmonate-responsive transcription factor TcAP2 from Taxus cuspidata.

A novel transcription factor, TcAP2, was isolated from Taxus cuspidata by yeast one-hybrid strategy. This factor interacts with jasmonate- and elicitor-responsive element. Analysis of the deduced TcAP2 amino acid sequence revealed that TcAP2 contained a conserved AP2/ethylene-responsive element binding protein domain that consisted of 268 amino acids in a potential nuclear localization sequence.

OsHSF7 gene in rice, Oryza sativa L., encodes a transcription factor that functions as a high temperature receptive and responsive factor.

Three novel Class A genes that encode heat shock transcription factor (HSF) were cloned from Oryza Sativa L using a yeast hybrid method. The OsHSF7 gene was found to be rapidly expressed in high levels in response to temperature, which indicates that it may be involved in heat stress reception and response. Over-expression of OsHSF7 in transgenic Arabidopsis could not induced over the expression of most target heat stress-inducible genes of HSFs; however, the transcription of some HSF target genes was more abundant in transgenic plants following two hours of heat stress treatment.

Isolated and characterization of a cDNA encoding ethylene-responsive element binding protein (EREBP)/AP2-type protein, RCBF2, in Oryza sativa L.

A transcription factor RCBF2 which interacts with C-repeat/DRE was isolated from Oryza sativa L. by a yeast one-hybrid method. Analysis of the deduced RCBF2 amino acid sequence revealed that RCBF2 contained a conserved ethylene-responsive element binding protein (EREBP)/AP2 domain of 59 amino acids and a potential nuclear localization sequence.