We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Post-flood nitrogen and basal phosphorus management affects survival, metabolic changes and anti-oxidant enzyme activities of submerged rice (Oryza sativa).
- Authors
Gautam, Priyanka; Lal, Banwari; Raja, Rajagounder; Baig, Mirza Jaynul; Haldar, Deepika; Rath, Liza; Shahid, Mohammad; Tripathi, Rahul; Mohanty, Sangita; Bhattacharyya, Pratap; Nayak, Amaresh Kumar
- Abstract
Flooding is one of the major harmful abiotic stresses in the low lying areas of Asia and crop losses due to submergence are considerably high. Along with plant breeding techniques, agronomic management options in general and nutrient management in particular should be taken into consideration. Response of Sub 1 and non-Sub1 cultivars of rice to post-flood nitrogen (N) management under variable flood water was compared at maximum tillering stage. Submergence tolerance on survival, leaf senescence, metabolic changes, and anti-oxidant enzymatic activities were evaluated. Sub1 cultivars proved their superiority over IR-20 in terms of significantly higher survival, anti-oxidant enzymes and lower metabolic changes. Turbid water resulted in lower survival because of poor light transmission, chlorophyll retention and silt deposition. Basal phosphorus reduced the elongation, senescence and ethylene accumulation. Post-flood foliar spray of urea substantially increased the chlorophyll, soluble sugars and extenuated ethylene accumulation resulting in significantly higher survival. These nutrient management options can provide opportunities for better survival and productivity even under turbid water, helping farmers to cope with the existing problems in flood-prone areas. Post-flood nitrogen and basal phosphorus application were evaluated on submergence tolerance of rice under clear and turbid water with submergence tolerant and susceptible cultivars. Urea spray and basal phosphorus improved survival, chlorophyll, non-structural carbohydrates and reduced shoot elongation and ethylene even in turbid water. Nutrient management options can provide opportunities for better survival and establishment of submerged rice, helping farmers to cope with the existing problems in flood-prone areas.
- Subjects
RICE varieties; NITROGEN in agriculture; PHOSPHORUS in agriculture; PLANT metabolism; PLANT enzymes; CHLOROPHYLL; TURBIDITY; FLOODS
- Publication
Functional Plant Biology, 2014, Vol 41, Issue 12, p1284
- ISSN
1445-4408
- Publication type
Article
- DOI
10.1071/FP14093