The effect of water flooding at grain-filling stage on the uptake of heavy metal(loid)s by rice in slightly alkaline paddy soil

Based on the experiment of two inbred aromatic rice varieties and one hybrid aromatic rice line treated under four different temperatures( daymean temperature 21°C, 23°C, 26°C and 30°C respectively) during grain filling stage in phytotrons, the shape and arrangement of endosperm starch granules in rice grain transection were observed by scanning electron microscope and the related characteristics of rice grain qualities of chalky percent and chalkiness were analyzed at the same time. The results showed that under the lower temperature( daymean temperature21°C and 23°C), many large compound starch granules with clear angulars packed together regularly without significant natural gaps bewteen starch granules in the tansectional endosperm. However, with the increase of temperature, starch granules in the transectional endosperm were changed from regularly shaped and closely and orderly arranged to various shaped and chaoticly arranged with obvious natural gaps between starch granules, which was closely consistent with the poorer appearance quality under the higher temperature, which indicated that the endosperm structure is closely related with appearance quality of aromatic rice.

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Partitioning and metabolism of nitrate, asparagine, and allantoin in the soybean shoots at the grain-filling stage

Soil Science & Plant Nutrition ◽

10.1080/00380768.1984.10434726 ◽

1984 ◽

Vol 30 (4) ◽

pp. 583-587 ◽

Cited By ~ 4

Author(s):

Tadakatsu Yoneyama

Keyword(s):

Grain Filling ◽

Filling Stage ◽

Grain Filling Stage

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Variation of 13C and 15N enrichments in different plant components of labeled winter wheat (Triticum aestivum L.)

PeerJ ◽

10.7717/peerj.7738 ◽

2019 ◽

Vol 7 ◽

pp. e7738

Author(s):

Zhaoan Sun ◽

Shuxia Wu ◽

Biao Zhu ◽

Yiwen Zhang ◽

Roland Bol ◽

...

Keyword(s):

Triticum Aestivum ◽

Winter Wheat ◽

Grain Filling ◽

Triticum Aestivum L ◽

N Fertilization ◽

Wheat Growth ◽

Filling Stage ◽

N Enrichment ◽

Two Stages ◽

Grain Filling Stage

Information on the homogeneity and distribution of 13carbon (13C) and nitrogen (15N) labeling in winter wheat (Triticum aestivum L.) is limited. We conducted a dual labeling experiment to evaluate the variability of 13C and 15N enrichment in aboveground parts of labeled winter wheat plants. Labeling with 13C and 15N was performed on non-nitrogen fertilized (−N) and nitrogen fertilized (+N, 250 kg N ha−1) plants at the elongation and grain filling stages. Aboveground parts of wheat were destructively sampled at 28 days after labeling. As winter wheat growth progressed, δ13C values of wheat ears increased significantly, whereas those of leaves and stems decreased significantly. At the elongation stage, N addition tended to reduce the aboveground δ13C values through dilution of C uptake. At the two stages, upper (newly developed) leaves were more highly enriched with 13C compared with that of lower (aged) leaves. Variability between individual wheat plants and among pots at the grain filling stage was smaller than that at the elongation stage, especially for the −N treatment. Compared with those of 13C labeling, differences in 15N excess between aboveground components (leaves and stems) under 15N labeling conditions were much smaller. We conclude that non-N fertilization and labeling at the grain filling stage may produce more uniformly 13C-labeled wheat materials, whereas the materials were more highly 13C-enriched at the elongation stage, although the δ13C values were more variable. The 15N-enriched straw tissues via urea fertilization were more uniformly labeled at the grain filling stage compared with that at the elongation stage.

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Role of growth regulators and plant water extracts on the productivity and water use efficiency of wheat genotypes under limited water supply

Bioscience Journal ◽

10.14393/bj-v35n6a2019-42372 ◽

2019 ◽

Vol 35 (6) ◽

Author(s):

Safdar Hussain ◽

Abdul Rehman ◽

Muhammad Akram ◽

Javaid Iqbal ◽

Tahira Batool Qaisrani ◽

...

Keyword(s):

Growth Regulators ◽

Block Design ◽

Compatible Solutes ◽

Water Extract ◽

Grain Filling ◽

Plant Water ◽

Wheat Genotypes ◽

Water Extracts ◽

Filling Stage ◽

Grain Filling Stage

Empowerment of wheat genotypes by application of growth regulators, compatible solutes and plant extracts under water restriction is an important strategy for getting sustainable yield. Field trail was performed at the research area of the Faculty of Agricultural Sciences, Ghazi University, Dera Ghazi Khan, Pakistan. Three wheat cultivars Aas-2011, Faisalabad- 2008 and Triple dwarf-1 were subjected to drought stress (skipping the irrigation at grain filling stage). The wheat genotypes were subjected to treatments viz., T1 i.e. All normal irrigation without application of abscisic acid (ABA), salicylic acid (SA), moringa (MLE) and mulberry leaf water extract (MBLE), T2 i.e. skipping the irrigation at grain filling stage and application of 2µM ABA, T3 i.e. skipping the irrigation at grain filling stage and application of 10 m mol SA, T4 i.e. skipping the irrigation at grain filling stage and application of 15% MLE and T5 i.e. skipping the irrigation at grain filling stage and application of 10% MBLE. The experiment was laid out in Randomized Complete Block Design with factorial arrangement and repeated three times. From this study it is concluded that Aas-2011 shown best result under drought condition by applying growth regulators and plant water extracts. rs and plant water extracts.

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