Dynamics of dry matter accumulation in internodes indicates source and sink relations during grain-filling stage of japonica rice

Effects of nitrogen amount on yield and nutrient absorption of cold land japonica rice under the condition of straw returning were studied using cold land rice variety Dong Nong 428 as experimental material. The results showed as follows: yields and effective spikes increased first then reduced, and the highest yield and effective panicles per plant was 7983.33 kg·hm-2 and 17.7 per plant that was found in treatment with nitrogen amount was 133 kg/hm2; differences of plant N, P and K accumulation of each treatment in tillering stage were not obvious and showed single peak curve change in heading stage while took on obvious increasing trend in grain filling stage and maturity stage. The straw returning increased effective spikes while had no effects on yield, spike weight, total shriveled rate and 1000-grain weight; the straw returning also had no effects on N, P and K accumulation in tillering and heading stage while it inhibit N, P and K accumulation in grain filling stage, and it inhibited N accumulation while promoted P and K accumulation in maturity stage.

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Effects of open-field warming during grain-filling stage on grain quality of two japonica rice cultivars in lower reaches of Yangtze River delta

Journal of Cereal Science ◽

10.1016/j.jcs.2018.04.004 ◽

2018 ◽

Vol 81 ◽

pp. 118-126 ◽

Cited By ~ 14

Author(s):

Zhi Dou ◽

She Tang ◽

Wenzhu Chen ◽

Haixiang Zhang ◽

Ganghua Li ◽

...

Keyword(s):

Open Field ◽

Yangtze River ◽

Grain Quality ◽

Grain Filling ◽

Yangtze River Delta ◽

Japonica Rice ◽

Rice Cultivars ◽

Filling Stage ◽

Grain Filling Stage

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Effects of Exposure of Wheat Ears to High Temperature on Dry Matter Accumulation and Carbohydrate Metabolism in the Grain of Two Cultivars. II. Carry-Over Effects

Functional Plant Biology ◽

10.1071/pp9910179 ◽

1991 ◽

Vol 18 (2) ◽

pp. 179 ◽

Cited By ~ 22

Author(s):

CF Jenner

Keyword(s):

High Temperature ◽

Dry Weight ◽

Grain Filling ◽

Dry Matter Accumulation ◽

Ambient Conditions ◽

Filling Stage ◽

Single Grain ◽

Grain Filling Stage ◽

Cool Conditions ◽

Hexose Phosphates

Yield of wheat exposed in the field during the grain-filling stage to brief episodes of high (but sub- lethal) temperature is reduced as a consequence of lower single grain weight due mainly to diminished accumulation of starch. To simulate these effects, ears of wheat were enclosed in a transparent box midway through the grain filling stage and heated (35�C day/25�C night) above ambient conditions (21�C day/16�C night) for periods of up to 7 days. Afterwards the ears were returned to ambient conditions. Two cultivars known to differ in their tolerance of high temperature were compared. Final single grain dry weight of the more tolerant cultivar (Kalyansona) was not significantly affected by exposure to heat, but it was reduced in cv. Sun 9E by approximately 15.5% after 7 days of exposure. Rate of grain filling in the cool conditions following previous exposure to high temperature was also substantially slower in both cultivars than it was in ears that had not been heated. Following transfer from hot to cool conditions, the amounts of fructose and the concentration of UDP-glucose returned to control levels. On the other hand, quantities of sucrose in the grain of ears that had been heated rose higher than in ears that had been kept continuously in cooler conditions. Thus any effects of high temperature at the sucrose synthase step appeared to be readily reversible, and both cultivars responded similarly. Cultivar-dependent responses were observed however in effects on the concentrations of hexose phosphates and ADP-glucose. After only one hot day the concentration of G-6-P, F-6-P and G-1-P returned to control levels following transfer to the cooler environment. After 2 or more days the concentrations of these metabolites did not recover in cv. Sun 9E but recovery was observed in cv. Kalyansona after 2 or 4 days' exposure, but not after 7 hot days. Last, concentrations of ADP-glucose in the cultivar of which starch deposition was reduced most at high temperature (Sun 9E) rose more after transfer from high to low temperature than was the case in the more tolerant cultivar (Kalyansona), and ADP-glucose concentrations fell more in the latter than in the former cultivar as a consequence of 7 days at high temperature. It is suggested that more than one action of temperature could be involved in the cultivar-dependent responses to high temperature: effects on starch synthase activity as well as on the metabolism and possibly transport of hexose phosphates are possibilities in accordance with the information available.

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DRY MATTER PARTITIONING OF MAIZE PLANT AS AFFECTED BY WATER MANAGEMENT AT DIFFERENT GROWTH STAGES

Tropical Agrobiodiversity ◽

10.26480/trab.01.2020.31.36 ◽

2020 ◽

Vol 1 (1) ◽

pp. 31-36

Author(s):

Md. Shahriar Kobir ◽

Md. Rashedur Rahman ◽

A.K.M. Mominul Islam

Keyword(s):

Water Management ◽

Dry Matter ◽

Grain Filling ◽

Maize Plant ◽

Growth Stages ◽

Dry Matter Partitioning ◽

Leaf Stage ◽

Filling Stage ◽

Grain Filling Stage ◽

Different Growth Stages

The research work was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, in the fiscal year 2017-2018 to study the dry matter partitioning of maize plant affected by water management at different growth stages. The research was conducted in a split plot design with three replications where irrigation stages were allocated in main plots and varieties were allocated in sub plots. There were five irrigation management treatments viz. I0 – (No irrigation), I1 – (Four leaf stage + eight leaf stage + tasselling stage+ grain filling stage), I2 – (Four leaf stage+ eight leaf stage + tasselling stage), I3- (Eight leaf stage + tasselling stage +grain filling stage), I4 -(Four leaf stage + tasselling stage+ grain filling stage), I5 -(Four leaf stage+ eight leaf stage+ grain filling stage) and there were three varieties viz. V1 – (BARI hybrid vutta-9), V2 – (BARI hybrid vutta-13), V3 – (pacific-559) in the experiment. The highest dry matter by root, culm, leaf, tassel and cob as well as by total dry matter and seed yield was obtained with the water management treatment I1(Four leaf stage + eight leaf stage + tasselling stage+ grain filling stage) which is statistically similar to treatment I4(Four leaf stage + tasselling stage+ grain filling stage) and the highest dry matter by root, culm, leaf, tassel and cob as well as total dry matter and seed yieldwas obtained due to the varietal factor V3 (pacific-559). Interaction between I1 irrigation treatment and V3 varietal factor (I1V3) were found to be the best combination for maximum dry matter production which is statistically similar to I4V3 interaction. As I4 treatment and I4V3 interaction are cost effective than I1 treatment and I1V3 interaction, respectively, irrigation should be given at Four leaf stage, tasselling stage, and grain filling stage with variety pacific-559 for maximum dry matter as well as for maximum grain production in maize

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