Search

Pedicel length is a crucial agronomic trait of cucumbers. Fruit deformation can occur When the pedicel is too long or too short. Moreover, an appropriate pedicel length is advantageous for mechanized harvesting. Therefore, it is essential to investigate the molecular regulatory mechanisms underlying cucumber pedicel length. In the current study, we obtained a short pedicel mutant through EMS mutagenesis and discovered that the reduced cell number was the primary cause of the shortened pedicel. Upon analyzing the hormone content, we found that the level of trans zeatin in the long-pedicel material was significantly higher than that in the short-pedicel material. Further transcriptome sequencing analysis revealed that differentially expressed genes were enriched in cytokinin synthesis-related pathways. Based on these results, the present study concluded that cucumber pedicel length is regulated by genes related to the cytokinin synthesis pathway and that differences in length result from differences in zeatin content and cell number. [ABSTRACT FROM AUTHOR]

Pedicel length is a crucial agronomic trait of cucumbers. Fruit deformation can occur When the pedicel is too long or too short. Moreover, an appropriate pedicel length is advantageous for mechanized harvesting. Therefore, it is essential to investigate the molecular regulatory mechanisms underlying cucumber pedicel length. In the current study, we obtained a short pedicel mutant through EMS mutagenesis and discovered that the reduced cell number was the primary cause of the shortened pedicel. Upon analyzing the hormone content, we found that the level of trans zeatin in the long-pedicel material was significantly higher than that in the short-pedicel material. Further transcriptome sequencing analysis revealed that differentially expressed genes were enriched in cytokinin synthesis-related pathways. Based on these results, the present study concluded that cucumber pedicel length is regulated by genes related to the cytokinin synthesis pathway and that differences in length result from differences in zeatin content and cell number. [ABSTRACT FROM AUTHOR]

• Two treatments of disease-resistant material avoided interference with growth and development-related genes. • Allantoin and jasmonic acid mediate the resistance response to powdery mildew in melon. • Ca2+ and WRKY transcription factors transmit resistance-related signals. Powdery mildew is a major fungal disease affecting melon production, and analyzing the molecular regulatory mechanism of resistance in melon is a prerequisite for melon molecular breeding of powdery mildew resistance. In this study, a resistant melon material was selected for inoculation and sterile water control treatments, and four time points, 0 h, 24 h, 48 h and 72 h after treatment, were selected for transcriptome sequencing analysis. The content of disease resistance related hormones was also determined and WGCNA analysis was performed. The results showed that allantoin and jasmonic acid were related to the regulation of powdery mildew resistance in melon, and key genes responding to the disease resistance response were found. In this study, we found that powdery mildew infested melon leaves induced a rise in the content of allantoin, which in turn induced a rise in the content of jasmonic acid and induced the accumulation of reactive oxygen species and thus resistance through the signaling of Ca2+ and WRKY transcription factors. This study initially explored the molecular regulatory mechanism of powdery mildew resistance in melon and provided a theoretical basis for molecular breeding of powdery mildew resistance in melon. [ABSTRACT FROM AUTHOR]