Identification of citrus APX gene family and their response to CYVCV infection.

Ascorbate peroxidase (APX) is one of the most important antioxidant enzymes in the reactive oxygen metabolic pathway of plants. The role of APX under biotic and abiotic stress conditions has been explored, but the response pattern of APX under biotic stresses is relatively less known. In this study, seven CsAPXs gene family members were identified based on the sweet orange (Citrus sinensis) genome and subjected to evolutionary and structural analysis using bioinformatics software.

Transcriptomic and metabolomic analyses provide insight into the volatile compounds of citrus leaves and flowers.

Background: Previous reports have mainly focused on the volatiles in citrus fruits, and there have been few reports about the volatiles in citrus leaves and flowers. However, citrus leaves and flowers are also rich in volatile compounds with unique aromas. Here, to investigate the volatiles in citrus leaves and flowers, volatile profiling was performed on leaves from 62 germplasms and flowers from 25 germplasms.

Comparison of Aroma Character Impact Volatiles of Thummong Leaves ( Litsea petiolata Hook. f.), Mangdana Water Beetle ( Lethocerus indicus), and a Commercial Product as Flavoring Agents in Thai Traditional Cooking.

Thummong ( Litsea petiolata Hook. f.) is a tree native to southern Thailand.

Molecular characterization of a citrus yellow vein clearing virus strain from China.

The complete nucleotide sequence of an isolate of citrus yellow vein clearing virus from Yunnan, China (CYVCV-RL), was determined following whole-genome amplification by RT-PCR. The CYVCV-RL genome was 7529 nt in length, excluding the 3' poly (A) tail, and contained six open reading frames (ORFs), resembling that of viruses belonging to the genus Mandarivirus in the family Alphaflexiviridae. Sequence analysis showed that the CYVCV-RL shared the greatest nucleotide sequence identity with the CYVCV-Y1 (JX040635) isolate from Turkey for the whole genome (97.

Ultrastructural Changes and Putative Phage Particles Observed in Sweet Orange Leaves Infected with 'Candidatus Liberibacter asiaticus'.

Huanglongbing (HLB), also known as citrus greening, is currently the most destructive citrus disease. Anatomical analyses of HLB-affected sweet orange were carried out by light and electron microscopy. As compared with healthy citrus, the phloem plasmodesmata were plugged with callose, and in some samples the phloem was collapsed.