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CsFUL1 and auxin participate in the CsCLV3-CsWUS mediated carpel number variation in cucumber (Cucumis sativus L.)

ABSTRACT: CsFUL1 and auxin participate in the CsCLV3-CsWUS mediated carpel number variation in cucumber (Cucumis sativus L.)

PROVIDER: PRJNA517913 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8507270_1.fastq.gz	Fastqsanger.gz
	SRR8507270_2.fastq.gz	Fastqsanger.gz
	SRR8507271_1.fastq.gz	Fastqsanger.gz
	SRR8507271_2.fastq.gz	Fastqsanger.gz
	SRR8507272_1.fastq.gz	Fastqsanger.gz

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CsFUL1 and auxin participate in the CsCLV3-CsWUS mediated carpel number variation in cucumber (Cucumis sativus L.)

Project description:The carpel number (CN) is an important fruit trait affecting fruit shape, size, and internal quality in cucumber. CsCLAVATA3 (CsCLV3) was previously showed to be the simply inherited gene responsible for carpel number variation in cucumber, but the molecular mechanism of CsCLV3 regulating carpel number remains elusive. Here, we found that the expression of CsCLV3 was negatively correlated with carpel number variation in different cucumber lines. Knock down of CsCLV3 by RNAi led to increased number of petals and carpels, suggesting that CsCLV3 functions as a negative regulator for floral organ number in cucumber. WUSCHEL (WUS) has been well characterized to promote CLV3-expressing stem cell activity in a non-cell autonomous manner to regulate meristem maintenance and floral organ number. However, here we found the expression region of CsCLV3 overlaps with CsWUS in the basal domain of meristem, and CsCLV3 interact with CsWUS at the protein level through binding to the WUS-box motif. Overexpression of CsFUL1, a FRUITFULL-like MADS-box gene involved in fruit length regulation, resulted in increased number of floral organs in cucumber. Biochemical analyses indicated that CsFUL1 can directly bind to CsWUS promoter to stimulate its expression. Further, we found that auxin participates in carpel number variation in cucumber through physical interaction of AUXIN RESPONSE FACTOR 14 (CsARF14) and CsWUS. Therefore, CsFUL1 and CsARF14 are two new players in the WUS-CLV pathway in determining carpel number variation in cucumber.

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Project description:The successful fusion of sperms and eggs need firstly the reception of pollens by stigmatic papillae, and then the unobstructed transmitting tract (TT) providing an extension channel for pollen tubes carrying with sperm cells. However, the genes involved in transmitting tract specification and cavity formation in cucumber remained largely unknown. Here, we characterized the bHLH gene, Cucumis sativus SPATULA (CsSPT) and its redundant function with Cucumis sativus ALCATRAZ (CsALC) in TT development and stigma convergence in cucumber.

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Project description:Ethylene, as a signaling hormone molecule, is proved to have essential role in the process of root development. In the present study, cucumber (Cucumis sativus L.) seedlings were employed to estimate differentially expressed proteins (DEPs) during the adventitious rooting using iTRAQ technique and proteomics analysis. Out of the 5014 DEPs, 115 DEPs were considered as identified proteins, and among them, 24 DEPs are interesting proteins abundance.

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A Functional Allele of CsFUL1 Regulates Fruit Length through Repressing CsSUP and Inhibiting Auxin Transport in Cucumber

Project description:Cucumber (Cucumis sativus L.) is an important vegetable crop bearing fleshy pepo fruits that harvested immature. The fruit length is one of the most important agricultural traits that directly determine the fruit yield and affects fruit quality, but the regulatory mechanism of fruit length variation remains elusive. Here we found a FRUITFULL-like MADS-box gene CsFUL1 functions as a key repressor for fruit length regulation in cucumber. The expression of CsFUL1 is highly enriched in male flowers and fruits, and negatively correlated with fruit length in different cucumber lines. Notably, a key SNP in CsFUL1 was selected during cucumber domestication for long fruit. Ectopic expression of CsFUL1 was unable to rescue the indehiscent fruit phenotype of ful-1 in Arabidopsis. Overexpression of CsFUL1 resulted in increased floral organs and reduced fruit length, whereas knockdown of CsFUL1 led to elongated fruit in cucumber. Transcriptome and biochemical analyses showed that CsFUL1 regulates fruit length through two pathways: one by inhibiting the PIN-FORWED (PIN1/7)-mediated auxin transport and thus downregulates auxin related genes in the fruit, and the other by forming a tetramer with other MADS-box genes to repress the CsSUP-mediated cell division and cell expansion. In addition, we found that CsFUL1 promotes locule number variation through the classical CsWUS-CsCLV pathway. Our findings uncover the regulatory commonality and specificity during development of different fruit types, and provide an important candidate gene to customize fruit length during cucumber breeding.

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