The objective of research is Hevea and Ricinus which are two of the latex-producing plant species. The modelling of protein was obtained from Hevea brasiliensis and Ricinus communis. Identification of small heat shock heat protein 18.1kDa very different between hevea and ricinus to coverage 92% and 69% analyzed by SWISS-MODEL. In addition, the data from similarity, identity, range, and Q-mean were distinct. According to the PHYRE2 analysis, we observed the residue presenting in Hevea and Ricinus not much different (Hevea: 12-158; Ricinus: 11-156). The 3D-ligand site prediction confirms is not found in Hevea as well as Ricinus. Appropriately, the small heat shock protein involved in different species will be helpful in the development of stress tolerance in plant crops, the different homology images and templates were identified as different binding site predictions. These models can be used for supporting the Hevea and Ricinus proteins modeling, mainly in the molecular study.

Hevea brasiliensis Muell. Arg. (rubber plant) is one of the most significant sources natural rubber in the world. Planting material used is vegetative propagation that called a clone. Each rubber clone has specific adaptability. Adaptation of rubber in drought area is a complex trait. The current study assesses of the bioinformatics on the NCBI database as well as expected the physicochemical of protein dehydration. Several parameters of physicochemical protein dehydration in H. brasiliensis were varied among the genes observed. There is twenty (20) protein dehydration induced from H. brasiliensis deposited in NCBI. The length of the genes was alternated with the genes ascertained. Several lines of coded amino acids were 370 to 1490 bp. The mitochondria target peptide value diversified from 0.020 to 0.342, signifying that it is expected to be a presence. The present resulted indicated the prominence of the variation and role of a physical and chemical characteristic of the distinct amino acids in protein dehydration genes as drought stress in rubber.

The growth and leaf anatomy of plants in general time will changes when cultivated in drought area. An adaptation plant process that can be assessed from morphological characters. The research was conducted in a greenhouse and physiology laboratory at Sungei Putih Research Center, Indonesian Rubber Research Institute from June to September 2020. The study design is factorial randomized block design (RBD), the first factor is rubber clones (IRR 425, IRR 428, IRR 429, IRR 434, IRR 440, RRIC 100, BPM 24), the second factor is water content based on capasity field (CF) (30%, 60%, 90%) with repeated three times. The data is analyzed by MINITAB 6 software. If the analysis showed a significant difference, it would be continued by Tukey 5% test. The observed characters were plant height (cm), girth (mm), cuticle thickness (μm), stomata density and leaf relative water content (%). The results showed plant height and girth a decrease when the water content 30% CF, while cuticle thickness, stomata density and leaf relative moisture content appeared to be relatively same between among water content. IRR 434 clone is selected as clone with highest of plant height and stem diameter in drought stress.