Morphometrics and Structural Changes of “Terung Asam” Sarawak (Solanum lasiocarpum Dunal) During Growth and Development

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Albert Ting Koon Soon
Phebe Ding
Shiamala Devi Ramaiya


“Terung asam” Sarawak (Solanum lasiocarpum Dunal) is an underutilised fruit vegetable. Information on the fruit growth is very lacking. Thus, this study was conducted to characterise fruit growth pattern based on physical characters and cellular structures. Data were recorded weekly from fruit set until senescence. All the morphological growth of “terung asam” fruit exhibits a single sigmoid growth pattern that fitted well to logistic model. There are three distinct phases of growth, i.e., S1, S2 and S3. At S1, the size of fruit cells was small without intercellular spaces. As fruit grew to S2, cell size increased with distinct vascular tissues. By S3, fruit has achieved its maximum size with green peel turn to yellow and finally golden yellow at late S3. Cuticle and two types of trichomes formed the outer layer of fruit. The thickness of fruit exocarp increased while density of trichomes decreased as fruit developed.

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Morphometrics and Structural Changes of “Terung Asam” Sarawak (Solanum lasiocarpum Dunal) During Growth and Development . (2023). Tropical Life Sciences Research, 34(3), 23–36.
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Boini A, Bresilla K, Perulli G, Manfrini L, Grappadelli C L and Morandi B. (2019). Photoselective nets impact apple sap flow and fruit growth. Agricultural Water Management 226: 105738.

Bouzayen M, Latché A, Nath P and Pech J C. (2010). Chapter 16: Mechanism of fruit ripening. In E C Pua and M R Davey (eds.). Plant developmental biology: Biotechnological perspectives. Volume 1. Berlin/Heidelberg, Germany: Springer, 319–339.

Ding P and Mashah N C. (2016). Growth, maturation and ripening of underutilized Carissa congesta fruit. Fruits 71: 171–176.

Federal Agriculture Marketing Authority (FAMA). (2021). Report on latest average prices of daily commodity at retail levels. (Accessed on 9 January 2021).

Fischer G, Almanza-Merchán P J and Ramírez F. (2012). Source-sink relationships in fruit species: A review. Revista Colombiana de Ciencias Horticolas 6: 238–253.

Jamaludin N A, Ding P and Hamid A A. (2011). Physico-chemical and structural changes of red-fleshed dragon fruit (Hylocereus polyrhizus) during fruit development. Journal of the Science of Food and Agriculture 91: 278–285.

Lara I, Belge B and Goulao L F. (2014). The fruit cuticle as a modulator of postharvest quality. Postharvest Biology and Technology 87: 103–112.

Meyer R S, Karol K G, Little D P, Nee M H and Litt A. (2012). Phylogeographic relationships among Asian eggplants and new perspectives on eggplant domestication. Molecular Phylogenetics and Evolution 63: 685–701.

Mijin S and Ding P. (2020). Growth development and structural changes of Malaysian jackfruit cv. Tekam yellow syncarp. Scientia Horticulturae 272: 109594.

Mohammad M and Ding P. (2019). Physico-textural and cellular structure changes of Carissa congesta fruit during growth and development. Scientia Horticulturae 246: 380–389.

Pei M S, Cao S H, Wu L, Wang G M, Xie Z H, Gu C and Zhang S L. (2020). Comparative transcriptome analyses of fruit development among pears, peaches, and strawberries provide new insights into single sigmoid patterns. BMC Plant Biology 20: 108.

Shariah U, Rajmah M R, Wong M H and Nur N H. (2013). Terung asam Sarawak technology package. Sarawak, Malaysia: Department of Agriculture Sarawak.

Srivastava A and Handa A K. (2005). Hormonal regulation of tomato fruit development: A molecular perspective. Journal of Plant Growth Regulation 24: 67–82.

Tee Y K, Ding P and Rahman N A A. (2011). Physical and cellular structure changes of Rastali banana (Musa AAB) during growth and development. Scientia Horticulturae 129: 382–389.

Ting A K S and Ding P. (2021). A review on wild indigenous eggplant, terung asam Sarawak (Solanum lasiocarpum Dunal.). Sains Malaysiana 50: 595–603.

Toivonen P M and Brummell D A. (2008). Biochemical bases of appearance and texture changes in fresh-cut fruit and vegetables. Postharvest Biology and Technology 48: 1–14.

Yeats T H and Rose J K. (2013). The formation and function of plant cuticles. Plant Physiology 163: 5–20.

Zaro M J, Vicente A R, Ortiz C M, Chaves A R and Concellón A. (2015). Eggplant. In: Y H Hui and E O Evranuz (eds.), Handbook of vegetable preservation and processing. Boca-Raton, FL: CRC Press, 500–515.