What's to know about hibiscus

Views: 2     Author: Site Editor     Publish Time: 2023-01-12      Origin: Site

1. The introduction of Roselle

Roselle (Hibiscus sabdariffa L.) also known as Hibiscus is an annual herbaceous plant in the genus Hibiscus of the mallow family. Roselle is a tetraploid plant (2n=4x=72) that originated in Africa.Introduced into Taiwan in 1910, it has been cultivated in a large area in Guangxi, Fujian, Guangdong, Yunnan and other places in China, and is a tropical and subtropical cash crop with a variety of economic uses.


2. The biological characteristics of Hibiscus

Hibiscus is a dicotyledon plant with conical straight root system, and the stem color is divided into four types: red (Figure 1a), green (Figure 1b), purple red (Figure 1c), and red-green mosaic (Figure 1d). 


The leaves are palmate lobes, which change according to certain rules, and the leaf cycle is presented as ovate leaves-trilobed-pentalobed-trilobed-trilobed-lanceolate (Fig. 2); 


The flower color was divided into three types: yellow (Fig. 3a, B), pink (Fig. 3c), and purple red (Fig. 3d). The corolla is detached and spiral-shaped, with 5 petals, superimposed, born alone in leaf axils, and the peduncles are short; The anthers are yellow, yellow-brown, dark brown 3 kinds, bean-shaped, each flower about 60 anthers; There are two colors of stigma: purple and yellow; 


The calyx of rosette (Fig. 4) is fleshy, with 5-7 sepals, triangular, tapering, and inferior synphytic; 10-14 parasepals, attached to the base of the sepals; The sepals have a pronounced midrib, forming a pronounced ridge along the edge of the sepals, and on the back of the sepals there is a pronounced gland, the calyx gland (Figure 5a), which begins to secrete nectar on the day of flowering; 


Roselle capsules are ovoid, with a hairy surface (Figure 5b), 5-6 chambers per fruit, 4-6 seeds per chamber; Seeds are yellowish brown or grey-brown when mature, seeds sub-kidney shaped (Figure 5C), 1,000 grains weighing 30-40 g; The seed has a large embryo, with a bead hole at the tip, the seed umbilicus is diamond-shaped, the ovule is inverted, and there is a ridge-like band near the bead hole and the seed umbilicus, containing a vascular bundle, and the bead stem is curved called the seed vein.

Fig. 1 Morphological characteristics of Roselle stems

Fig. 2 Morphological characteristics of Roselle leaves

Fig. 3 Morphological characteristics of Roselle flowers

Fig. 4 Morphological characteristics of Roselle calyx

Fig. 5 Morphological characteristics of Roselle capsules, seeds and calyx glands


References

1. Babalola S O,Babalola A O, Aworh O C. Compositional attributes of the calyces of ros elle (Hibiscus sabdariffa L.). Journal of Food Technology in Africa, 2001, 6(4):133-134.

2. Mnzava N A . Vegetable crop diversification and the place of traditional species in the tropics. Journal of Philosophy, 1997, 97(153):725-738.

3. Shahidi F, Ho C T. Phenolic compounds in foods and natural health products. Oxford University Press, 2005. 114-142.

4 . ZENG Tinghua, XU Xiong, ZHUO Rensong Chemical composition and utilization of Roselleum (review). Subtropical Plant Communications, 1980, 1:8-18

5. CHEN Muzhi, LIU Dongfeng, ZHUANG Biao , LIN Fuzhen Development and research of Roselle seed oil China Oils and Fats, 2001, 5:10-1

6. Jin Jianliang. Cultivation of "Red Peach K" Technique . Sichuan Agricultural Science and Technology, 2007, 11:35

7. Li Huizhong High-yield cultivation technology of Roselle set corn Yunnan Agriculture, 2011, 7: 13

8 . LI Xiufen, ZHU Jianjun, ZHANG Jianfeng, YIN Liqing Research Progress on Introduction and Application of Hibiscus Tomato Shanghai Journal of Agricultural Sciences, 2015, 31(5):136-139

9. Lin Dongsheng A preliminary study on the plantation of Roselleae in rubber plantations Fujian Rezuo Science and Technology, 1990, 2: 33-34

10. Lu Dewen Effects of phosphorus stress on physiological and biochemical effects of Hibiscus seedlings Anhui Agricultural Science Bulletin, 2012, 18(21): 83-86

11. Yanhong Zhao, Wenhuan Hou, Xiaofang Liao, Xingfu Tang , Chuying Li Effects of different sunshine duration on the main agronomic traits of Roselleum Crops, 2020, 2: 172-175




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