scholarly journals Changes In Biochemical Components Of Rice Following Naa Application

2014 ◽  
Vol 40 (2) ◽  
pp. 173-178
Author(s):  
Nargis Jahan ◽  
AMM Golam Adam
Keyword(s):  
Chlorophyll A ◽  
Energy Content ◽  
Oryza Sativa L ◽  
Foliar Spray ◽  
Grain Filling ◽  
Naphthalene Acetic Acid ◽  
Flowering Stage ◽  
Filling Stage ◽  
Biochemical Components ◽  
Grain Filling Stage

An investigation on the effect of Naphthalene acetic acid (NAA) on the changes of biochemical components of two varieties of rice (Oryza sativa L.), BRR1 dhan 29 and BRRI dhan 50 was carried out. Two concentrations of NAA, 100 and 200 ppm were used as foliar spray. In BRRI dhan 29, significant increases in chlorophyll a and chlorophyll b contents of leaf were observed due to both the treatments at the flowering stage, whereas, carotenoids at the grain filling stage only. But in BRRI dhan 50, the total leaf pigments decreased at the flowering and grain filling stage, but was significant in case of chlorophyll a at the flowering stage. Significant increases in protein content of leaf were recorded at the tillering and flowering stage of BRRI dhan 29 following 100 ppm NAA treatment. In BRRI dhan 50, the only significant increase was recorded at grain filling stage due to 200 ppm NAA treatment. In both the varieties carbohydrates, protein, fat, and energy content of grain increased due to both the treatments and the maximum increase in all the cases was recorded due to 100 ppm NAA treatment. Ash and moisture content of grain reduced following both the treatments in both the varieties, the maximum reduction was due to 100 ppm NAA treatment Asiat. Soc. Bangladesh, Sci. 40(2): 173-178, December 2014

Photosynthesis in Wheat at the Grain Filling Stage Is Altered by Larval Wheat Stem Sawfly (Hymenoptera: Cephidae) Injury and Reduced Water Availability

2007 ◽  
Vol 42 (2) ◽  
pp. 228-238 ◽  
Author(s):  
Tulio B. Macedo ◽  
David K. Weaver ◽  
Robert K. D. Peterson
Keyword(s):  
Chlorophyll A ◽  
Water Availability ◽  
Chlorophyll A Fluorescence ◽  
Grain Filling ◽  
Larval Feeding ◽  
Primary Metabolism ◽  
Wheat Stem Sawfly ◽  
Filling Stage ◽  
Grain Filling Stage ◽  
Reduced Water

The impact of larval feeding by wheat stem sawfly, Cephus cinctus Norton (Hymenoptera: Cephidae), and reduced water availability on the photosynthesis and primary metabolism of wheat, Triticum aestivum (L.), was evaluated at the grain-filling developmental stage. Photosynthetic parameters measured included photosynthesis (Ps), stomatal conductance (gs), and transpiration (E) in the flag leaves. The parameters were measured at 4 wks after the treatments were imposed. Additional concomitant chlorophyll a fluorescence measurements were taken using both dark- and light-adapted tests. Photosynthesis was significantly affected by C. cinctus injury and suboptimal water availability. However, no significant interaction was observed between the two treatment factors. Plants under a reduced or suboptimal watering regime had Ps rates that were 43.7% lower than plants that were watered daily. We also observed a 12% higher Ps rate in uninfested plants compared to plants infested by C. cinctus. Several chlorophyll a fluorescence parameters also were affected by C. cinctus. Specifically, reductions in the photochemical efficiency of photosystem II (PSII) of C. cinctus infested plants were observed for plants under reduced water availability. This study demonstrates that wheat plants at the grain filling stage have reduced photosynthetic capacity when watered less frequently or when subjected to C. cinctus larval feeding injury. Less frequent watering and larval feeding injury did not have significant impacts on yield in this greenhouse study.

scholarly journals Identification and Expression Analysis of microRNAs at the Grain Filling Stage in Rice(Oryza sativa L.)via Deep Sequencing

PLoS ONE ◽  
2013 ◽  
Vol 8 (3) ◽  
pp. e57863 ◽  
Author(s):  
Rong Yi ◽  
Zhixuan Zhu ◽  
Jihong Hu ◽  
Qian Qian ◽  
Jincheng Dai ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Expression Analysis ◽  
Deep Sequencing ◽  
Oryza Sativa L ◽  
Grain Filling ◽  
Filling Stage ◽  
Grain Filling Stage

scholarly journals Effect of Nitrogen Scheduling and Cultivars on Yield Attributes and Yields of Sorghum (Sorghum bicolor L.)

2020 ◽  
Author(s):  
Pappu Khatik ◽  
J. X. Massey ◽  
Shrimohan Meena
Keyword(s):  
Grain Yield ◽  
Nitrogen Content ◽  
Block Design ◽  
Foliar Spray ◽  
Grain Filling ◽  
Available Nitrogen ◽  
Yield Attributes ◽  
Leaf Stage ◽  
Filling Stage ◽  
Grain Filling Stage

A field experiment was conducted during kharif season of 2013 at Udaipur (Rajasthan) to find out the effect of nitrogen scheduling and cultivars on yield attributes, yield and soil fertility status after harvest of sorghum. Treatment consisted two cultivars (V1: CSH 16 and V2: CSV 20) and five nitrogen schedules (N1: 50% at sowing as basal + 50% at 30 DAS, N2: 50% at sowing as basal + 25% at 30 DAS + 25% at boot leaf stage, N3: 25% at sowing as basal + 50% at 30 DAS + 25% at boot leaf stage, N4: 25% at sowing as basal + 50% at 30 DAS + 15% at boot leaf stage + 10% at grain filling stage, N5: 25% at sowing as basal + 45% at 30 DAS + 5% foliar spray at 45 DAS + 15 % at boot leaf stage + 10% at grain filling stage) were assigned in a factorial randomized block design. The results revealed that the cultivar CSH 16 recorded significantly higher number of grains per panicle, 1000 grain weight, grain yield (1521 kg/ha), harvest index (13.17) and nitrogen content in plant, whereas significantly higher number of primaries per panicle, stover yield (11141 kg/ha) and available nitrogen in soil were recorded in CSV 20. Application of nitrogen in N2 schedule (50% at sowing as basal + 25% at 30 DAS + 25% at boot-leaf stage) had marked influence on yield attributes, yield and nitrogen content in plant when compared to rest of the nitrogen schedules. Therefore, it was concluded that significantly higher grain yield was recorded in cultivar CSH 16 and N2 schedule of nitrogen application from sorghum.

scholarly journals Effects of Irrigation Levels on the Yield of Chickpea (Cicer Arietinum Linn) Due to Incidence of Helicoverpa Armigera

2021 ◽  
Vol 50 (4) ◽  
pp. 1203-1207
Author(s):  
Keshav Mehra ◽  
Veer Sing
Keyword(s):  
Seed Yield ◽  
Helicoverpa Armigera ◽  
Grain Filling ◽  
Flowering Stage ◽  
Larval Population ◽  
Filling Stage ◽  
Helicoverpa Armígera ◽  
Initiation Stage ◽  
Grain Filling Stage ◽  
Irrigation Levels

Effects of four different irrigation levels viz., One irrigation at 50 per cent flowering stage, one irrigation at grain filling/pod initiation stage, two irrigations (one at 50 per cent flowering + one at grain filling stage), control (without irrigation) on the incidence of gram pod borer, Helicoverpa armigera (Hubner) on chickpea were studied during Rabi, 2014-15 and 2015-16 at Research Farm, College of Agriculture, Bikaner (Rajasthan), India. Results revealed that the highest mean larval population (3.12 larvae per 5 plants) and maximum pod damage (33.24%) were recorded in the crop which was irrigated twice viz., one at 50 per cent flowering stage and second at grain filling stage. The lowest larval population (2.03 larvae per 5 plants) with minimum pod damage (8.34%) was recorded in the crop where irrigation was not given. The maximum seed yield (11.05 q/ha) was obtained from the crop which was irrigated two times and minimum seed yield (7.56 q/ha) was obtained in control. Bangladesh J. Bot. 50(4): 1203-1207, 2021 (December)

scholarly journals Effects of NAA and different nitrogen levels on nutrient uptake by BARI Gom-26 (Triticum aestivum L.)

2016 ◽  
Vol 42 (1) ◽  
pp. 69-76
Author(s):  
Saiful Islam ◽  
Nargis Jahan
Keyword(s):  
Grain Filling ◽  
N Fertilizer ◽  
Flowering Stage ◽  
K Uptake ◽  
N Content ◽  
Nitrogen Levels ◽  
Filling Stage ◽  
P Content ◽  
Npk Uptake ◽  
Grain Filling Stage

An experiment was conducted to evaluate the effects of NAA (0, 25, 50 ppm) at varying nitrogen levels (0, 50, 75, 100 % of the recommended dose) on nitrogen (N), phosphorus (P) and potassium (K) uptake by shoot and root and percentage of total NPK uptake by BARI Gom-26 at flowering and grain filling stage. Application of NAA at varying nitrogen levels had significant effect on P and K uptake by shoot and root at both stages, whereas, the N content of shoot at flowering stage and of root at the grain filling stage were non-significant.At both the stages, K content of root increased following all the treatments. At flowering and grain filling stage, P content of root and shoot increased and decreased due to different treatments. The maximum percentage of total NPK uptake was recorded from K followed by N and P respectively at both stages. In majority cases there was a decreasing trend in percentage uptake of N and P at grain filling stage compared with flowering stagewhereas, the trend was almost reverse in case of K. The N content of grain increased following all the treatments, the maximum being due to 25 ppm NAA in combination with 75 % N-fertilizer. Only decrease in P content of grain was recorded when 25 ppm NAA without any N-fertilizer was applied. In case of K content, 50 ppm NAA without any N-fertilizer resulted the only decrease. The highest nitrogen use efficiency (NUE) by total plant was also recorded from 50 ppm NAA in combination with 50 % N-fertilizer at flowering stage, whereas, from 25 ppm NAA in combination with 75 % N-fertilizer at grain filling stage.J. Asiat. Soc. Bangladesh, Sci. 42(1): 69-76, June 2016

Relationship between leaf photosynthetic function at grain filling stage and yield in super high-yielding hybrid rice (Oryza sativa. L)

2002 ◽  
Vol 45 (6) ◽  
pp. 637-646 ◽  
Author(s):  
Huqu Zhai ◽  
Shuqing Cao ◽  
Jianmin Wan ◽  
Rongxian Zhang ◽  
Wei Lu ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Hybrid Rice ◽  
Oryza Sativa L ◽  
Grain Filling ◽  
Filling Stage ◽  
Grain Filling Stage
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