Morphology and propagation of Blyxa aubertii rich

Awang, Robiah (2007) Morphology and propagation of Blyxa aubertii rich. [Project Paper] (Submitted)

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Abstract

This study is an attempt to furnish information with respect to the morphology and propagation of Blyxa aubertii Rich. from four locations; UPMKB, Baloi, Bintulu; Maradong, Sarikei and 19km golf field, Sibu. Blyxa aubertii is an annual plant can be found submersed in natural and man-made water bodies with 0.10-1.20 m water level. Live on silted clay substrate, water pH 5-6.6, temperature 26.4-27.9°C and dissolved oxygen 0.5-3.57 mg/L. Blyxa aubertii grows associated with other aquatic macrophytes such as Eleoclzaris sp., Hydrilla verticillata, Nymphaea nouchali, Utricularia aurea and Utricularia bifida. The vegetative morphology of Blyxa aubertii from UPMKB, Baloi, Maradong and Sibu are generally similar but the dimension analysis shows some variable. The number of leaves per shoot from UPMKB (7-800 leaves) is significantly higher when compared with Sibu (6-32 leaves), Maradong (8-27 leaves) and Baloi (10-23 leaves). The longest leaves were obtained from Baloi 26.90±8.43 cm followed by Maradong 15.18±3.73 cm, UPMKB 12.38 ± 3.19 cm and the smallest from Sibu 10.67±1.73 cm. The leaf widths of B. aubertii from UPMKB were similar to Maradong with 0.48 ± 0.09 cm and 0.48±0.12 cm respectively. However, these leaves width significantly different when compared with Baloi 0.68±0.12 cm and Sibu 0.35±0.04 cm. Blyxa aubertii leaves consist a lot of air spaces without stomata were observed. Flowers are hermaphrodite, covered by spathe in bud stages, borne on the hypanthium. Blyxa aubertii have three sepals, three petals, three stamens and three stigmas. Ovary as long as the spathe. The fruits of are elongated capsule 17.81-66.88 mm x 1.95-3.64 mm with peduncle 2.66-27.35 cm. Seeds count varies from 22-132 seed per fruit. Blyxa aubertii have ellipsoidal seed with 5-12 longitudinal ribs. The first sign of germination is the swollen of the seed follow by emergence of radicle, splitting of seed coat, emergence of cotyledon, first leaf, second leaves and third leaf within two months. Blyxa aubertii germinates from seed, grows into seedlings, juvenile plants, flowering, fruiting plants and finally disappeared all occurring within a period of approximately four and half months.

Item Type:	Project Paper
Faculty:	Faculty of Agriculture and Food Sciences
Depositing User:	Mr. Azman Mohamad
Date Deposited:	17 Dec 2024 07:07
Last Modified:	17 Dec 2024 07:07
URI:	http://psaspb.upm.edu.my/id/eprint/2299

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