Effects of Shading on Carbohydrates of Syzygium samarangense


  • Ying JIAN South China Agricultural University, College of Horticulture, Guangzhou 510642 (CN)
  • Guolin WU Zhuhai Modern Agricultural and Developmental Center, Zhuhai 519070 (CN)
  • Donghui ZHOU Zhuhai Modern Agricultural and Developmental Center, Zhuhai 519070 (CN)
  • Zhiqun HU South China Agricultural University, College of Horticulture, Guangzhou 510642 (CN)
  • Zhenxuan QUAN South China Agricultural University, College of Horticulture, Guangzhou 510642 (CN)
  • Biyan ZHOU South China Agricultural University, College of Horticulture, Guangzhou 510642 (CN)




carbohydrates; shading; wax apple


Wax apple (Syzygium samarangense) is an important tropical fruit tree cultivated in Southeast Asian. It produces red pear-like shape fruits. The fruit flesh is considered high in antioxidants, phenolics, and flavonoids that have a potential to contribute to the human healthy diet, and was proved to have anti-inflammatory and antimicrobial characteristics. To allow year-round marketing of high quality wax apple fruit, growers always perform shading to inhibit new flushes so as to repress vegetative growth and promote reproductive growth. To investigate the effect of shading on carbohydrates, wax apple trees were shaded with sun shade nets under field conditions. The effects of shading on shoot growth were studied and leaf carbohydrate levels of the trees were determined. The results showed that shading inhibit the the growth of the terminal shoots and promoted bud dormancy. Shading also reduced total soluble sugar, sucrose, glucose, fructose, and starch levels of leaves. The results suggested that shading reduced carbohydrate accumulation and repressed vegetative growth.


Chen HB, Huang HB (2005). Low temperature requirements for floral induction in lychee. Acta Horticulturae 665:195-202.

Cho A, Chen N, Paull RE (2018). Modification of production systems for year-round marketing. Acta Horticulturae 1205:191-201.

Jamil NAM, Rahmad N, Rosli NHM, Al-Obaidi JR (2018). Proteomic and metabolomic study of wax apple (Syzygium samarangense) fruit during ripening process. Electrophoresis 39(23):2954-2964.

Li T, Dai JL, Zhang YJ, Kong XQ, Li CD, Dong HZ (2019). Topical shading substantially inhibits vegetative branching by altering leaf photosynthesis and hormone contents of cotton plants. Field Crop Research 238:18-26.

Lorenzo CD, Iserte JA, Lamas MS, Antonietti MS, Gagliardi PG, Hernando CE, … Yanovsky MJ (2019). Shade delays flowering in Medicago sativa. Plant Journal 99(1):7-22.

Menzel CM, Simpson DR (1988). Effect of temperature on growth and flowering of litchi (Litchi chinensis Sonn.) cultivars. Journal of Horticultural Science 63(2):349-360.

Moneruzzaman KM, Nasrulhaq Boyce A, Osman N, Sharif Hossain ABM (2012). Physiochemical and phytochemical properties of wax apple (Syzygium samarangense [Blume] Merrill & LM Perry var. ‘Jambu Madu’) as affected by growth regulator application. The Scientific World Journal 728613:1-13.

Quan Z, Wei D, Wu G, Zhou D, Huang X, Zhou B (2018). Changes of structure of apical buds and distribution of starch grains in wax apple during flowering formation. Journal of Fruit Science 35(7):845-852 (in Chinese).

Sheen J, Zhou L, Jang JC (1999). Sugars as signaling molecules. Current Opinion in Plant Biology 2(5):410-418.

Wu P, Zhou B, Chen J (2013). Changes in carbohydrate in branches and its relation to flowering in Averrhoa carambola. Acta Horticulturae 975:433-439.

Wu P, Wu C, Zhou B (2017). Drought stress induces flowering and enhances carbohydrate accumulation in Averrhoa Carambola. Horticultural Plant Journal 3(2):60-66.

Xu CJ, Chen WJ, Chen KS, Zhang SL (1998). A simple method for determining the content of starch-iodine colorimetry. Biotechnology 8:41-43 (in Chinese).

Xue YL (1985). Plant physiology manual. Shanghai Science and Technology Publication, Shanghai pp 134-138.

Yang H-F, Kim H-J, Chen H-B, Rahman J, Lu X-Y, Zhou B-Y (2014). Carbohydrate accumulation and flowering-related gene expression levels at different developmental stages of terminal shoots in Litchi chinensis. HortScience 49(11):1381-1391.

Zhou BY (2004). Responses of Stylosanthes guianensis to chilling and its regulation by abscisic acid. PhD Thesis, South China Agricultural University, Guangzhou (in Chinese).




How to Cite

JIAN, Y., WU, G., ZHOU, D., HU, Z., QUAN, Z., & ZHOU, B. (2019). Effects of Shading on Carbohydrates of Syzygium samarangense. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 47(4), 1252–1257. https://doi.org/10.15835/nbha47411637



Research Articles
DOI: 10.15835/nbha47411637