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Effect of Water Stress on Freezing Tolerance of Mexican Lime (Citrus aurantifolia L.) Seedlings
Reza Fotouhi Ghazvini,Mohammad Reza Baghbanha,Abdollah Hatamzadeh,Mokhtar Heidari 한국원예학회 2008 Horticulture, Environment, and Biotechnology Vol.49 No.5
Mexican lime (Citrus aurantifolia L.) is the most sensitive citrus plant to freezing. To study the effect of water stress on development of freezing tolerance of lime seedlings, changes of chlorophyll content, total soluble sugar, electrolyte leakage (EL), proline, and chlorophyll fluorescence parameters, as indicators of freezing damage were evaluated. The seedlings at the stage of 7-9 leaves were exposed to four levels of field capacity (FC) including 100%, 75%, 50%, and 25% FC. Then, water stressed plants were subjected to -2, -4, -6, and -8℃ freezing temperatures for 12 hours. The results showed an increase in EL and total soluble sugar during freezing stress, whereas chlorophyll content, efficiency of photosystem II (Fv/Fm), and electron transfer rate (ETR) considerably decreased. Within the water stressed treatments, 25% FC decreased EL to 71.5% of control, while chlorophyll content, soluble sugars, Fv/Fm, and ETR were significantly increased. Therefore, as a vital indicator, 25% FC water stress could improve freezing tolerance of lime seedlings.
Ultrasonographic findings of mesenchymal chondrosarcoma of the mandible: report of a case
Shahidi, Shoaleh,Shakibafard, Alireza,Zamiri, Barbod,Mokhtare, Mohammad Reza,Houshyar, Maneli,Houshyar, Maral,Amanpour, Sara Korean Academy of Oral and Maxillofacial Radiology 2012 Imaging Science in Dentistry Vol.42 No.2
Today, ultrasound imaging is being widely used to assess soft tissue lesions in the maxillofacial region. However, ultrasound investigations of intra-osseous lesions are rare, especially for tumors of the jaws. This report emphasized the capability of this useful imaging modality in identification of the characteristics of malignant conditions involving the bone. Mesenchymal chondrosarcoama, one of the unusual malignant conditions of the jaw, was presented in a young male with significant facial swelling. Different imaging modalities parallel with the histopathologic investigation confirmed the diagnosis. Interestingly, destruction of the bony cortex and new bone formation with a characteristic "sun ray appearance", highly suggestive of sarcomas, was manifested on the ultrasonograph. Thus, this report presented the ultrasonographic features of chondrosarcoma of mandible and considered the ultrasonography to be a useful imaging modality to evaluate intra-osseous jaw lesions.
Ultrasonographic findings of mesenchymal chondrosarcoma of the mandible: report of a case
Shoaleh Shahidi,Alireza Shakibafard,Barbod Zamiri,Mohammad Reza Mokhtare,Maneli Houshyar,Maral Houshyar,Sara Amanpour 대한구강악안면방사선학회 2012 Imaging Science in Dentistry Vol.42 No.2
Today, ultrasound imaging is being widely used to assess soft tissue lesions in the maxillofacial region. However, ultrasound investigations of intra-osseous lesions are rare, especially for tumors of the jaws. This report emphasized the capability of this useful imaging modality in identification of the characteristics of malignant conditions involving the bone. Mesenchymal chondrosarcoama, one of the unusual malignant conditions of the jaw, was presented in a young male with significant facial swelling. Different imaging modalities parallel with the histopathologic investigation confirmed the diagnosis. Interestingly, destruction of the bony cortex and new bone formation with a characteristic “sun ray appearance”, highly suggestive of sarcomas, was manifested on the ultrasonograph. Thus, this report presented the ultrasonographic features of chondrosarcoma of mandible and considered the ultrasonography to be a useful imaging modality to evaluate intra-osseous jaw lesions.