Structural Carbohydrates and Lignifications Associated with Submergence Tolerance in Rice (Oryza sativa L.)
Journal Title: Журнал ÑтреÑÑ-физиологии и биохимии - Year 2013, Vol 9, Issue 2
Abstract
Role of structural carbohydrate content and lignifications in rice shoot were studied in three indica rice ([i]Oryza sativa[/i] L.) cultivars namely FR13A (tolerant to submergence), IR42 (susceptible to submergence) and Sabita (adapted to medium depth, 0-50 cm stagnant flooding), varying degrees of tolerance to submergence under control and 8 days after submergence conditions. During submergence, Sabita and IR 42 accelerated the rate of stem and leaf elongation more than that of FR 13A. Submergence significantly reduces the cellulose and hemicelluloses content. The decrease was more pronounced in susceptible rice cultivar than that of tolerant rice cultivar. Lignifications’ was monitored by measuring the content of lignin and the activities of two enzymes of the lignin biosynthetic pathway, coniferyl alcohol dehydrogenase (CAD) and phenylalanine ammonia-lyase (PAL) in rice shoots. Lignin content and PAL and CAD activity was more in susceptible cv. both under control and 8d after submergence. In conclusion submergence induced elongation of rice shoot might decreased the structural carbohydrate level as our experiment showed a significant negative correlation of cellulose and hemicelluloses with plant height but also positively associated with plant survival under submergence. The content of lignin and activities of CAD and PAL showed negative association with shoot elongation, yet the association of these parameters with survival was non-significant.
Authors and Affiliations
Debabrata Panda, R. Sarkar
Keywords
Related Articles
- EP ID EP103987
- DOI -
- Views 101
- Downloads 0
Repetitive Measurements of Physiological pH by Implantable Optical Sensors in Muscles of adult Danio rerio: Preliminary Results
Encapsulated optical sensors are promising tool for measurements of physiological parameters inside living organisms. In the present study we tested the possibility to apply encapsulated fluorescent sensors to measure pH...
Improving of Barley Seedling Growth by Seed Priming Under Water Deficit Stress
Seed priming was used to reinforcement of barley seedling growth under water deficit stress in a greenhouse condition. Barley seeds were primed with humic acid, Pseudomonas Spp., Marmarin, distilled water (hydropriming)...
Effects of Some Environmental Variables on Urease in Germinating Chickpea (Cicer arietinum L.) Seed
Enzyme activity is influenced by a large number of factors. Environmental conditions such as pH, temperature, salt concentration, substrate concentration, activators, and inhibitors may change the three dimensional shape...
Активность, изоферментный спектр пероксидаз и дегидрины некоторых видов растений, произрастающих на берегах озера Байкал, при абиотическом стрессе
Термостабильность и оптимум рН слабосвязанной с клеточной стенкой и растворимой пероксидазы изменяется в зависимости от природных условий и сезонов вегетации. Активность пероксидазы тоже варьирует во времени. После пика...
LIGHT INFLUENCE ON SUCCINATE DEHYDROGENASE ACTIVITY IN<br /> MAIZE LEAVES
Photosynthesis and respiration participates in energy production by plants undo different light conditions. It looks quite important to provide a balanced regulation of these processes. It was show in presented study tha...