TAILIEUCHUNG - Relations between drought-resistance and chlorophyll content of 25 local upland rice cultivals (Oryza sativa L.)

Water retention ability of leave tissues of twenty five local upland rice cultivars (Oryza Sativa L.) was defined through the amount of water loss through different time frames. The results showed that the amount of water loss of leaf tissues of twenty five local upland rice cultivars through times: one hour, two hours, three hours, four hours, five hours and six hours had increased. | JOURNAL OF SCIENCE OF HNUE Natural Sci. 2010 Vol. 55 No. 6 pp. 161-168 RELATIONS BETWEEN DROUGHT-RESISTANCE AND CHLOROPHYLL CONTENT OF 25 LOCAL UPLAND RICE CULTIVALS Oryza Sativa L. Nguyen Thi Ngoc Lan and Chu Hoang Mau Thai Nguyen University of Education Nguyen Nhu Khanh Hanoi National University of Education E-mail ntnl2008@ Abstract. Water retention ability of leave tissues of twenty five local upland rice cultivars Oryza Sativa L. was defined through the amount of water loss through different time frames. The results showed that the amount of water loss of leaf tissues of twenty five local upland rice cultivars through times one hour two hours three hours four hours five hours and six hours had increased. Water loss of the same at the one-hour-time range to up to six-hours-time the amount of water loss in rice varieties have reached a value of about to . Gb has the highest dehydration resistant and the lowest is Klk. Total chlorophyll content of rice varieties ranges from to mg g leaving fresh weight and was ranged in order from high to low values of total chlorophyll content Gb gt Bsn gt Md gt Ln gt Bcc gt Kn gt Ss gt BCS gt Nn gt LTN gt Mt gt BLT gt Km gt Nro gt Lo gt Kk gt BCT gt Kp gt Kt gt Bic gt KPL gt Blx gt Kld gt KX gt Klk. Gb still has the highest bond chlorophyll content in all three types chlorophyll a chlorophyll b chlorophyll a b and Klk has the lowest. Total chlorophyll content total bond chlorophyll and dehydration resistant of leaves have close agreeable correlation. It can be based on the chlorophyll content in leaves to initially assess dehydration resistance of plants. Keywords Upland Rice Oryza Sativa L. chlorophyll drought resistance water retention. 1. Introduction One of the consequences of climatic change is increasing drought in many parts of the world including Vietnam. This is also the main cause promoting projects 161 Nguyen Thi Ngoc Lan Chu Hoang Mau and Nguyen Nhu Khanh and .

• Sinh học
• Natural science
• Upland Rice
• Oryza Sativa L
• Rought resistance
• Water retention
• Integrated teaching
• Natural Science education
• Natural Science teaching
• Dạy học tích hợp
• Giáo dục khoa học tự nhiên
• Dạy học khoa học tự nhiên
• Journal of Science and Technology
• Synthesis of hydroxyl terminated liquid natural rubber
• Hydroxyl terminated liquid natural rubber
• Deproteinized natural rubber
• Oxidative depolymerization of NR
• Mathematics – physics
• Teaching competency framework
• General education program
• Natural science teachers
• High school education
• Natural science teachers
• NATURAL LANGUAGE
• COMPUTER INTEBFACE DESIGN MURRAY TUROFF DEPARTMENT OF COMPUTER
• IiVFORMATION SCIENCE IIEW JERSEY INSTITUTE OF TECHNOLOGY
• scientific reports
• model language
• process natural language
• Master's thesis of Applied Science
• Master's thesis
• Studies in marine natural products
• Marine natural products
• Nasal cavity anatomy
• Experimental studies in rhinology
• Geometric variations
• Cambridge primary science
• Natural Science book
• Science English activity book 1
• Exercise primary English
• Learn Science with English
• Science English learner book 1
• Primary Enlish book
• Science English activity book 2
• Science English learn book 2
• Khoa học tự nhiên tiểu học
• Science English activity book 3
• Science English learn book 3
• Science English activity book 5
• Science English activity book 6
• Environmental science
• Lecture Environmental science
• Natural system
• Environmental problems
• Natural world
• Sustainable future
• Sustainability in ecosystems
• Organic compounds
• Dynamic equilibrium
• The human population
• Saltwater intrusion
• Soil horizons
• Production of food