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Showing 3 results for Jonoubi

Parisa Jonoubi, Ahmad Majd, Aref Marouf, Shahla Amini,
Volume 2, Issue 3 (12-2015)

Pimpinella anisum L. belongs to Apiaceae family. The samples of vegetative and reproductive organs at different stages of development were gathered and investigated by cell-histology methods. The investigation of the anatomical structure of vegetative organs showed that the secretory ducts are arranged between the parenchymal tissues of the leaf. Section of flower buds revealed that anthers had 4 pollen sacs, the division of pollen mother cell was of the simultaneous type, microspore tetrads were of tetragonal type and the tapetum layer was secretory. The study of the ultrastructure of pollen grains with SEM showed that they had 3 pores. The ovary was found to be two-chambered and two-carpeled the ovule to be anatropous and to have one membrane. In embryogenic investigation it was found that the embryos were globular, cotyledonary and torpedo-shaped and the transition between globular embryos to cordate embryos was found. The vegetative organs were observed to have the general structure of dicotyledons. The development patterns of ovule and embryo sac follow the Polygonum type. Tetrahedral microspore tetrads were observed. The ultrastructure of pollens was found to be similar to those of Smyrnium, a genus of Apiaceae family. All stages of embryogenesis were covered in this study. 

Elaheh Zamani Bahramabadi, Parisa Jonoubi, Farkhondeh Rezanejad,
Volume 6, Issue 1 (5-2019)

The environmental conditions which the parent plant has undergone during seed development can affect many properties of the seeds such as degree of dormancy, weight and the amount of their compounds. In this study, mature pistachio seeds of Ahmadaghaei cultivar, collected from the two cities of Rafsanjan and Shahrbabak located in Kerman Province (Iran), were compared. It was found that the seeds collected from Shahrbabak being a cooler and wetter region had a longer dormancy, although the water content of the two seed series were similar. Dehydrin proteins generally play a role in protecting plant cells against dehydration stress. Dehydrin contents of the cotyledons and embryonic axes of the two seed series were compared by western blot method using an antibody against the conserved K segment in dehydrin proteins. It was found that the cotyledons had five dehydrin versions with molecular weights of 23, 25, 32, 39 and 48 kDa, the expression of which not being influenced by environmental factors. It was found that the embryonic axes had seven other versions of dehydrin with weights of 17, 19, 20, 28, 67, 77 and 98 kDa in addition to those five versions. This shows higher protection of embryonic axes compared with the cotyledons. The 25 and 28 kDa versions had higher expression levels in embryonic axes of Shahrbabak seeds, while the 39 kDa version had a higher expression level in embryonic axes of Rafsanjan seeds.
Elham Mohajel Kazemi, Maghsoud Pazhohandeh, Parisa Jonoubi, Mina Kazemian,
Volume 7, Issue 1 (4-2020)

One of the main strategies to improve plant tolerance is the expression of stress-induced genes, which play a significant role in the ionic balance of plants. SOS3 is one of the important components of SOS-regulated ionic homeostasis pathway. Therefore, the expression of this gene could be an important step towards producing salt-resistant plants. In this work, we have transformed tomato (Solanum lycopersicum) by Agrobacterium (GV3101 and LBA4404) containing plasmids with SOS3 genes. The maximum regeneration rate was determined in cotyledons of CH genotype. The simultaneous use of cotyledons and hypocotyls in the culture medium had the best outcome. In addition, the best time was found to be one day after inoculation. Also, the best transgenic variety was detected for Agrobacterium GV3101, which can be attributed to the interaction between the genus Agrobacterium and the tomato variety. Transgenic plants were transferred to a culture medium containing sequestrene, which caused the acceleration of the seedling growth in particular. The presence of the SOS3 in the transgenic plants was verified by PCR and RT-PCR methods.

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