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Rural environment is the base for the development of rural tourism. At the construction of socialism new rural, the rural tourism environment has been turned to a radical change. The paper analysed from the meaning and the composing of ruroal tourism environment, applyed to discuss the changes and the characcteristics of harmonious rural tourism environment under the construction of socialism new rural, and wish to advance the development of harmonious rural tourism.

MADS-box genes have been demonstrated to participate in a number of processes in tomato development, especially fruit ripening. In this study, we reported a novel MADS-box gene, SlMBP15, which is implicated in fruit ripening. Based on statistical analysis, the ripening time of SlMBP15-silenced tomato was delayed by 2–4 days compared with that of the wild-type (WT). The accumulation of carotenoids and biosynthesis of ethylene in fruits were decreased in SlMBP15-silenced tomato. Genes related to carotenoid and ethylene biosynthesis were greatly repressed. SlMBP15 can interact with RIN, a MADS-box regulator affecting the carotenoid accumulation and ethylene biosynthesis in tomato. In addition, SlMBP15-silenced tomato produced dark green leaves, and its plant height was reduced. The gibberellin (GA) content of transgenic plants was lower than that of the WT and GA biosynthesis genes were repressed. These results demonstrated that SlMBP15 not only positively regulated tomato fruit ripening but also affected the morphogenesis of the vegetative organs. [ABSTRACT FROM AUTHOR]

The acetylation levels of histones on lysine residues are regulated by histone acetyltransferases and histone deacetylases, which play an important but understudied role in the control of gene expression in plants. There is an increasing research focus on histone deacetylation in crops, but to date, there is little information regarding tomato. With the aim of characterizing the tomato HD2 family of histone deacetylases, an RNA interference (RNAi) expression vector of SlHDT3 was constructed and transformed into tomato plants. The time of fruit ripening was delayed and the shelf life of the fruit was prolonged in SlHDT3 RNAi lines. The accumulation of carotenoid was decreased by altering of the carotenoid pathway flux. Ethylene content was also reduced and expression of ethylene biosynthetic genes ( ACS2 , ACS4 and ACO1 , ACO3 ) and ripening-associated genes ( RIN , E4 , E8 , PG , Pti4 and LOXB ) was significantly down-regulated in SlHDT3 RNAi lines. The expression of genes involved in fruit cell wall metabolism ( HEX , MAN , TBG4 , XTH5 and XYL ) was inhibited compared with wild type. These results indicate that SlHDT3 functions as a positive regulator of fruit ripening by affecting ethylene synthesis and carotenoid accumulation and that SlHDT3 lies upstream of SlMADS-RIN in the fruit ripening regulatory network. [ABSTRACT FROM AUTHOR]

Carbon-carbon coupling is a basic design principle for the synthesis of porous organic polymers, which are widely used in gas adsorption/separation, photocatalysis, energy storage, etc. However, the C(sp 3 )-C(sp 3 ) coupling reaction to construct porous organic polymers remains an important yet elusive objective due to its low reactivity and unknown side reactions. Herein, we report that nickel bis(1,5-cyclooctadiene) (Ni(COD) 2 ), which was a famous catalyst for C(sp 2 )-C(sp 2 ) coupling reactions, enables highly efficient C(sp 3 )-C(sp 3 ) homo-coupling reactions to construct porous linear crystalline polymers and flexible three-dimensional porous aromatic frameworks (PAFs) under mild reaction conditions. The resulting linear polymers generated with dibromomethyl arenes have good crystallinity and high melting points ( T m = 286 °C) due to controllability of reaction sites. Furthermore, the PAFs (PAF-64, PAF-65 and PAF-66) stemmed from tri-/tetra-bromomethyl arenes show high surface area ( S BET = 390 m 2 g -1 ) and high methane-storage capacity (up to 313 cm 3 cm -3 ) because of their flexible frameworks. This work sheds new light on the construction of novel porous polymers through C(sp 3 )-C(sp 3 ) coupling reactions and the development of methane-storage materials., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)