scholarly journals Studies on Salt Tolerance in Korean Rice Cultivars. II. Effects of NaCl treatment on sodium and potassium ions concenrration in leaf blade, leaf sheath and root of rice plants.

1996 ◽  
Vol 65 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Dong-Ha CHO ◽  
Ryoichi ITOH ◽  
Ryuichi ISHII
Keyword(s):  
Salt Tolerance ◽  
Leaf Blade ◽  
Leaf Sheath ◽  
Potassium Ions ◽  
Rice Cultivars ◽  
Rice Plants ◽  
Korean Rice ◽  
Sodium And Potassium

Fundamental parenchyma cells are involved in Na+ and Cl– removal ability in rice leaf sheath

2019 ◽  
Vol 46 (8) ◽  
pp. 743 ◽  
Author(s):  
Sarin Neang ◽  
Marjorie de Ocampo ◽  
James A. Egdane ◽  
John D. Platten ◽  
Abdelbagi M. Ismail ◽  
...  
Keyword(s):  
Salt Tolerance ◽  
Tissue Level ◽  
Leaf Sheath ◽  
Salt Sensitivity ◽  
Salt Tolerant ◽  
Basal Leaf ◽  
Rice Plants ◽  
Rice Leaf ◽  
Parenchyma Cells ◽  
Rice Genotypes

Salt sensitivity in rice plants is associated with the accumulated amount of Na+ and Cl– in shoots and, more significantly, in photosynthetic tissues. Therefore, salt removal ability at the leaf sheath level is an important mechanism of salt tolerance. In the present study we attempted to determine whether rice leaf sheaths excluded Cl– as well as Na+, and to identify the tissues that were involved in the removal ability of both ions. In two rice genotypes, salt-tolerant FL478 and -sensitive IR29, leaf sheaths excluded Na+ and Cl– under NaCl treatment as estimated using their sheath:blade ratios. The sheath:blade ratio of Na+ but not of Cl–, was increased by NaCl treatment. Under NaCl treatment, Na+ concentration was higher in the basal leaf sheath, whereas Cl– concentration was higher in the middle and tip parts. At the tissue level, fundamental parenchyma cells of leaf sheaths retained the highest amounts of Na and Cl when treated with high amount of NaCl. These results imply that the leaf sheath potentially functions to remove excess Na+ and Cl– from xylem vessels in different locations along the axis, with the fundamental parenchyma cells of leaf sheaths being involved in over-accumulation of both Na+ and Cl–.

Linkage between brown planthopper resistance and morphological characters in rice

1987 ◽  
Vol 108 (3) ◽  
pp. 649-653
Author(s):  
G. S. V. Prasad ◽  
M. V. S. Sastry ◽  
T. E. Srinivasan ◽  
M. B. Kalode
Keyword(s):  
Leaf Blade ◽  
Brown Planthopper ◽  
Morphological Characters ◽  
Leaf Sheath ◽  
Rice Cultivars ◽  
Linkage Groups ◽  
Brown Planthopper Resistance ◽  
Pericarp Colour

SummaryLinkage was detected between brown planthopper resistance and anthocyanin or nonanthocyanin pigmentation in rice cultivars. The crossover values were: 21·9–37% for leaf sheath, 31% for junctura, 41% for auricle, 12·5–40% for ligule, 14·32–1% for leaf tip and margin, 19·7–37% for stigma, 19·7–36% for apiculus and 46·7% for pericarp colour. Genes governing resistance and black hull colour or glabrousness of leaf blade assorted independently. The genes identified and designated for brown planthopper resistance and pigmentation have been tentatively proposed to linkage groups II, IV and V.

The Qualities of Makgeolli (Korean Rice Wine) Made with Different Rice Cultivars, Milling Degrees of Rice, and Nuruks

2012 ◽  
Vol 41 (12) ◽  
pp. 1785-1791 ◽  
Author(s):  
Yoonji Lee ◽  
Haechang Yi ◽  
Keum Taek Hwang ◽  
Dong-Ho Kim ◽  
Hyun Jung Kim ◽  
...  
Keyword(s):  
Rice Wine ◽  
Rice Cultivars ◽  
Korean Rice

scholarly journals OsNAC45 is Involved in ABA Response and Salt Tolerance in Rice

Rice ◽  
2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Xiang Zhang ◽  
Yan Long ◽  
Jingjing Huang ◽  
Jixing Xia
Keyword(s):  
Transcription Factors ◽  
Salt Stress ◽  
Salt Tolerance ◽  
Stress Responses ◽  
Crop Yields ◽  
Plant Stress ◽  
Root Cells ◽  
Nac Transcription Factors ◽  
Rice Plants ◽  
Plant Stress Responses

Abstract Background Salt stress threatens crop yields all over the world. Many NAC transcription factors have been reported to be involved in different abiotic stress responses, but it remains unclear how loss of these transcription factors alters the transcriptomes of plants. Previous reports have demonstrated that overexpression of OsNAC45 enhances salt and drought tolerance in rice, and that OsNAC45 may regulate the expression of two specific genes, OsPM1 and OsLEA3–1. Results Here, we found that ABA repressed, and NaCl promoted, the expression of OsNAC45 in roots. Immunostaining showed that OsNAC45 was localized in all root cells and was mainly expressed in the stele. Loss of OsNAC45 decreased the sensitivity of rice plants to ABA and over-expressing this gene had the opposite effect, which demonstrated that OsNAC45 played an important role during ABA signal responses. Knockout of OsNAC45 also resulted in more ROS accumulation in roots and increased sensitivity of rice to salt stress. Transcriptome sequencing assay found that thousands of genes were differently expressed in OsNAC45-knockout plants. Most of the down-regulated genes participated in plant stress responses. Quantitative real time RT-PCR suggested that seven genes may be regulated by OsNAC45 including OsCYP89G1, OsDREB1F, OsEREBP2, OsERF104, OsPM1, OsSAMDC2, and OsSIK1. Conclusions These results indicate that OsNAC45 plays vital roles in ABA signal responses and salt tolerance in rice. Further characterization of this gene may help us understand ABA signal pathway and breed rice plants that are more tolerant to salt stress.

scholarly journals Small virus-like particles isolated from the leaf sheath tissues of rice plants and from the rice tarsonemid mites, Steneotarsonemus spinki smiley (Acarina, Tarsonemidae).

1984 ◽  
Vol 50 (3) ◽  
pp. 368-374 ◽  
Author(s):  
Eishiro SHIKATA ◽  
Shinji KAWANO ◽  
Toshihiro SENBOKU ◽  
Emmanuel R. TIONGCO ◽  
Kuniyuki MIYAJIMA
Keyword(s):  
Leaf Sheath ◽  
Virus Like Particles ◽  
Rice Plants ◽  
Small Virus

Phomopsis oryzae-sativae. [Descriptions of Fungi and Bacteria].

1980 ◽  
Author(s):  
E. Punithalingam
Keyword(s):  
Geographical Distribution ◽  
Leaf Blade ◽  
Leaf Sheath ◽  
Advanced Stage ◽  
Collar Rot ◽  
Oryza Saliva ◽  
Water Splash

Abstract A description is provided for Phomopsis oryzae-sativae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Oryza saliva. DISEASE: Collar rot of rice, appearing at the end of tillering stage. Visible symptoms are small dark brown lesions at the base of the auricle of the topmost fully expanded leaf. These lesions enlarge to cover the whole auricle and in the advanced stage lesions extend to the adjacent parts of the leaf sheath and leaf blade. Within 14 days the blade joint at the top of leaf sheath turns dark brown and then rots, causing the leaf blade to drop off (Kanjanasoon, 1962). GEOGRAPHICAL DISTRIBUTION: Asia (Thailand). TRANSMISSION: No studies reported. Conidia presumably dispersed by water splash.

Sign in / Sign up

Export Citation Format

Share Document