IThe plastome of Manilkara zapota is found to be 158,386 bp long with the typical quadripartite structure of angiosperms, contains two inverted repeats (IRs) of 26,099 bp each, a large single-copy (LSC) region of 87,745 bp, and a small single-copy (SSC) region of 18,443 bp. The plastome contains 114 genes, consisting of 80 unique protein-coding genes, 30 unique tRNA genes, and 4 unique rRNA genes. The overall A/T content in the plastome of M. zapota is 63.00%. The phylogenetic analysis indicated that M. zapota is close to Sideroxylon wightianum within Sapotaceae in this study.

Traditional settlements are widely concerned by academic circles for their unique settlement patterns, exquisite residential buildings, and rich historical and cultural connotations, and their protection and development is an important proposition for rural revitalization. Therefore, from the perspective of big data mining (BDM), this paper explores its application in architectural space and settlement protection of traditional settlements in Hainan and provides new ideas for the protection and renewal of traditional settlements in Hainan. The attribute elements of spatial data of settlement groups are analyzed by the decision tree classification mining method. In order to avoid the multivalued tendency of ID3 algorithm and improve the efficiency of decision tree generation by ID3 algorithm, an improved ID3 algorithm is proposed by introducing user interest and simplifying the calculation process of the algorithm. At the same time, the graph theory recognition method of grid pattern is proposed. Aiming at the intersection graph and direction relation graph of straight line pattern, grid pattern recognition is realized by solving the connectivity, intersection, and subsequent construction of the maximum complete subgraph. Experiments show that the improved ID3 algorithm has better running efficiency than the parallel algorithm based on cooccurrence matrix. The analysis of the architectural space of traditional settlements in Hainan will help us better grasp social activities and provide direction for the protection and renewal of traditional settlements from the perspective of tourists and residents.

Salacia amplifolia belongs to Celastraceae. The complete plastome of S.amplifolia is 163,255 bp in length, including two inverted repeat (IR) regions of 28,932 bp, a large single-copy (LSC) region of 86,856 bp, and a small single-copy (SSC) region of 18,535 bp. The plastome contains 113 genes, consisting of 79 unique protein-coding genes, 30 unique tRNA genes, and 4 unique rRNA genes. The overall A/T content in the plastome of S. amplifolia is 62.50%. The complete plastome sequence of S. amplifolia will provide a useful resource for the conservation genetics of this specie as well as for the phylogenetic studies of Salacia.

Mussaenda hirsutula is a plant of the family Rubiaceae. So far, there is no study on the genomic information of M. hirsutula. Here, we report and characterize the complete plastid genome sequence of M. hirsutula in an effort to provide genomic resources useful for promoting its conservation. The complete plastome is 155,503 bp in length and contains the typical structure and gene content of angiosperm plastome, including two inverted repeat regions of 25,964 bp, a large single-copy region of 85,451 bp, and a small single-copy region of 18,124 bp. The plastome contains 115 genes, consisting of 81 unique protein-coding genes, 30 unique tRNA genes, and 4 unique rRNA genes. The overall A/T content in the plastome of M. hirsutula is 62.30%. The complete plastome sequence of M. hirsutula will provide a useful resource for the conservation genetics of this species as well as for the phylogenetic studies for Rubiaceae.