Document Type : Original Article
Authors
- Chong Vun 1
- Ummu Hani Binti Badron 2
- Mohamad Rodzi Bin Shafiee 3
- Nurul Ain Binti Abdul Aziz 3
- Bashiroh Binti Ahmad 3
- Nur Munirah Binti Sabki 2
1 Pest and Disease Management Programme, Rice Research Center, MARDI Alor Setar, Kedah, Malaysia
2 Forest Research Institute Malaysia (FRIM)
3 Malaysian Agricultural Research and Development Institute (MARDI)
Abstract
This study was conducted to determine the suitable anatomical and morphological characteristics of Malaysian weedy rice to identify weedy rice in the field. The field work was conducted at paddy seed producer farms in Kedah, Penang, Kelantan, and Terengganu, Malaysia. Seeds of dominant weedy rice varieties were collected from the field and grew in the greenhouse. Leaf blades and stems of weedy rice and cultivated rice were sampled at the flowering stage for preparing cross-section specimens. Three morphological characteristics (plant height, stem and leaf color, and flag leaf inclination angle of weedy rice and cultivated rice) were recorded at three stages of plant life (vegetative, flowering, and ripening stage). The study revealed that only a few varieties of weedy rice showed differences in terms of the epidermis thickness between weedy rice and cultivated rice. There was no apparent difference between weedy rice and cultivated rice in terms of the number of bulliform cell groups, vascular bundles, and aerenchyma cells in the leaf blade or stem. The differences in anatomical characteristics were inconsistent. In the field, most of the weedy rice was taller than cultivated rice. The study found that the color of the leaves and stems of weedy rice was yellow-green at all growth stages, but the leaves and stems of cultivated rice were green. Most of the weedy rice flag leaves started inclining 60 days after sowing. The finding indicated that the weedy rice leaf and stem color index can be a practical guideline for farmers to identify weedy rice in fields quickly.
Keywords
Main Subjects
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