Effects of Salinity Stress on the Seminal Root Tip Ultrastructures of Rice Seedlings (Oryza sativa L.)

• RAHMAN Md. Shahidur

  Graduate School of Bioagricultural Sciences, Nagoya University

• MATSUMURO Tomomi

  Graduate School of Bioagricultural Sciences, Nagoya University

• MIYAKE Hiroshi

  Graduate School of Bioagricultural Sciences, Nagoya University

• TAKEOKA Yoji

  Graduate School of Bioagricultural Sciences, Nagoya University

抄録

Growth and structural changes in the seminal root tip of rice seedlings (Oryza sativa L. cv. Nipponbare) in response to NaCl salinity were studied. Seedlings were grown in agar medium with 0, 0.1, 0.3, 1.0, 2.0 and 3.0% NaCl (agar culture), and in water with 0, 0.01, 0.03, 0.06 and 0.1% NaCl (water culture). Seedling growth was significantly suppressed by higher concentrations of NaCl. The effect of NaCl appeared faster in water culture than in agar culture. In both agar and water cultures, root growth was markedly suppressed over shoot growth. Under saline conditions, epidermis, cortex and root cap cells appear to be damaged to a greater extent than the meristem and stelar cells. The most notable ultrastructural change in response to salinity was the development and increment of vacuoles, which seem to provide a space for accumulation of excess ions. Many electron dense deposits were observed in the larger vacuoles of the epidermal and cortical cells. Under saline conditions, cell wall thickening of the epidermis, an increase in endoplasmic reticulum, myelin figures, less compact Golgi bodies and inhibited production of Golgi vesicles were also observed.

収録刊行物

• Plant production science

  Plant production science 4 (2), 103-111, 2001-06-01

  日本作物学会

キーワード

• Growth
• Oryza sativa L.
• Root tip
• Salinity
• Transmission electron microscopy (TEM)
• Ultrastructure
• Vacuole

詳細情報

• CRID: 1572824501769845504
• NII論文ID: 110001720736
• NII書誌ID: AA11162156
• ISSN: 1343943X
• 本文言語コード: en
• データソース種別:
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