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Phenotyping of Plants for Drought and Salt Tolerance Using Infra-Red Thermography
( Taek Ryoun Kwon ),( Kyung Hwan Kim ),( Hae Jin Yoon ),( Seung Kon Lee ),( Beom Ki Kim ),( Zamin Shaheed Siddiqui ) 한국육종학회 2015 Plant Breeding and Biotechnology Vol.3 No.4
Drought and salinity are the major environmental constrains in global agricultural production. Plant breeding for the drought and salt tolerance needs a proper assessment procedure to overcome stress constrain. Fundamental understanding on the physiological nature of the plant tolerance provides valuable information for the genetically modified crop`s development. Drought or salt stress induces several common physiological responses in plants such as water relation and photosynthetic capacitiy. It is because both stresses lead cellular dehydration in the plants, particularly, during the early phase of stress imposition. Drought and salinity decrease CO2 availability for photosynthesis via stomatal limitation as well as elevate leaf temperature due to partially closed stomata. In this scenario, stomatal regulation and plant water status are important aspects in abiotic stress environment. These physiological responses have a function to stabilize the temperature inside plant/leaf. Therefore phenotyping through an infra-red thermography (heat sensitive sensor), could be a useful tool in the selection of a tolerant genotypes. Infra-red thermography is a part of the electromagnetic spectrum which emits a certain amount of radiation as a function of their temperatures. In general, the plants which have less water, would have higher temperature and display more infra-red radiations. In abiotic stresses such as drought and salinity, plant water status is affected and varied from the sensitive to tolerant level. Infra-red images of plants are often linked with some of the physiological attributes to the tolerance. This review covers the limits, advantages, linkages, comparison and other prospectives of using thermal imagaes in modern phenotyping techniques.
Hong Jae Park,Taek Ryoun Kwon,Kyung Hwan Kim,Tae San Kim,Yong Hwan Park,Yong Hwan Kim 한국육종학회 2004 한국육종학회지 Vol.36 No.2
This study was carried out to investigate the best explant source and combination of media and growth regulators for the regeneration of multiple shoots in soybean (Glycine max. L. Merr.) cv. ‘Iksannamulkong’. Multiple shoots could well be directly induce
Lee, Seong-Kon,Kim, Beom-Gi,Kwon, Taek-Ryoun,Jeong, Mi-Jeong,Park, Sang-Ryeol,Lee, Jung-Won,Byun, Myung-Ok,Kwon, Hawk-Bin,Matthews, Benjamin F,Hong, Choo-Bong,Park, Soo-Chul Indian Academy of Sciences 2011 Journal of biosciences Vol.36 No.1
<P>Mitogen-activated protein kinases (MAPK) signalling cascades are activated by extracellular stimuli such as environmental stresses and pathogens in higher eukaryotic plants. To know more about MAPK signalling in plants, aMAPK cDNA clone, OsMAPK33, was isolated from rice. The gene is mainly induced by drought stress. In phylogenetic analysis, OsMAPK33 (Os02g0148100) showed approximately 47-93% identity at the amino acid level with other plant MAPKs. It was found to exhibit organ-specific expression with relatively higher expression in leaves as compared with roots or stems, and to exist as a single copy in the rice genome. To investigate the biological functions of OsMAPK33 in rice MAPK signalling, transgenic rice plants that either overexpressed or suppressed OsMAPK33 were made. Under dehydration conditions, the suppressed lines showed lower osmotic potential compared with that of wild-type plants, suggesting a role of OsMAPK33 in osmotic homeostasis. Nonetheless, the suppressed lines did not display any significant difference in drought tolerance compared with their wild-type plants. With increased salinity, there was still no difference in salt tolerance between OsMAPK33-suppressed lines and their wild-type plants. However, the overexpressing lines showed greater reduction in biomass accumulation and higher sodium uptake into cells, resulting in a lower K+/Na+ ratio inside the cell than that in the wild-type plants and OsMAPK33-suppressed lines. These results suggest that OsMAPK33 could play a negative role in salt tolerance through unfavourable ion homeostasis. Gene expression profiling of OsMAPK33 transgenic lines through rice DNA chip analysis showed that OsMAPK33 altered expression of genes involved in ion transport. Further characterization of downstream components will elucidate various biological functions of this novel rice MAPK.</P>
Transcriptome Analysis of ABA/JA-Dual Responsive Genes in Rice Shoot and Root
Kim, Jin-Ae,Bhatnagar, Nikita,Kwon, Soon Jae,Min, Myung Ki,Moon, Seok-Jun,Yoon, In Sun,Kwon, Taek-Ryoun,Kim, Sun Tae,Kim, Beom-Gi Bentham Sciences Publishers 2018 CURRENT GENOMICS Vol.19 No.1
<P>Abstract: The phytohormone abscisic acid (ABA) enables plants to adapt to adverse environmental conditions through the modulation of metabolic pathways and of growth and developmental programs. We used comparative microarray analysis to identify genes exhibiting ABA-dependent expression and other hormone-dependent expression among them in Oryza sativa shoot and root. We identified 854 genes as significantly up- or down-regulated in root or shoot under ABA treatment condition. Most of these genes had similar expression profiles in root and shoot under ABA treatment condition, whereas 86 genes displayed opposite expression responses in root and shoot. To examine the crosstalk between ABA and other hormones, we compared the expression profiles of the ABA-dependently regulated genes under several different hormone treatment conditions. Interestingly, around half of the ABA-dependently expressed genes were also regulated by jasmonic acid based on microarray data analysis. We searched the promoter regions of these genes for cis-elements that could be responsible for their responsiveness to both hormones, and found that ABRE and MYC2 elements, among others, were common to the promoters of genes that were regulated by both ABA and JA. These results show that ABA and JA might have common gene expression regulation system and might explain why the JA could function for both abiotic and biotic stress tolerance.</P>
Sofiane Abdelhamid,Hassouna Gouta,Mariem Gharsallaoui,Mohamed Ghrab,Taek-Ryoun Kwon,In-Sun Yoon,Myung Ok Byun 韓國國際農業開發學會 2013 韓國國際農業開發學會誌 Vol.25 No.4
This review highlights the current status of Tunisian olive production, challenges facing the sector and opportunities available. Olive, a fruit tree native to Mediterranean countries, is the subject of increased international interest for olive oil production for the global food market. Olive and olive oil production in Tunisia are of great socio-economic importance, with more than 70 millions olive trees including a wide range of cultivars and represents the third important leg in fruit production. Tunisia is the 4th largest producer of olive oil in the world and oil exports represent 40% of the overall value of agronomic exports and 5.5 % of aggregate exports, making it the fifth largest source of foreign currency earnings for the country. However, the actual production of olive oil could be increased by the entire contributors in the sector and by the monitoring by government extension services. Almost 2 out of 3 farmers grow olives in the country. The crop is spread over areas from the northern to the southern regions, where a wide range of edaphon-climatic conditions prevail, from lower semi-arid to arid conditions and receiving annually less than 250 mm of rain-fall (IOOC, 2003). So far, most of the production has been done using traditional techniques and under rainfed conditions. This translates into extremely erratic production levels depending on the year. The major challenges for olive production and for Tunisian producers are to improve fruit and oil quality in order to maintain their competitiveness on the international oil market and to meet consumer demands. The major opportunity available to develop Tunisian olive sector is primarily the improvement of yields, the raising of productivity and oil quality and meet the recent boom in demand for olive oil and table olive around the world.