Absorption and distribution of Na[+], Cl[-] and some other ions and physiological characteristics of Sago palm under salt stress

• EHARA Hiroshi

  Graduate School of Bioresources, Mie University

• SHIBATA Hiroyuki

  Graduate School of Bioresources, Mie University

• PRATHUMYOT Wikanya

  Graduate School of Bioresources, Mie University

• NAITO Hitoshi

  College of Life Science, Kurashiki University of Science and The Arts

• MIYAKE Hiroshi

  Graduate School of Bioagricultural Sciences, Nagoya University

書誌事項

タイトル別名

• Absorption and Distribution of Na<SUP>+</SUP>, Cl<SUP>-</SUP> and Some Other Ions and Physiological Characteristics of Sago Palm under Salt Stress

抄録

Na⁺, K⁺, Ca²⁺, Mg²⁺ and Cl^- concentrations in different plant parts and some physiological characteristics under NaCl treatment in solution culture were determined to investigate the salt resistance of sago palm. Seedlings at the 8th or 9th leaf stage were used for the treatment of 342mM (2%) NaCl in a phytotron at 30°C and 75% relative humidity under natural sunlight in mid summer in central Japan. Sago palm maintained a low Na⁺ concentration in the leaflets of active leaves at higher positions eventually, by storing Na⁺ mainly in the roots and the petioles at lower positions under the NaCl treatment applied for 31 days. The Na⁺ concentrations in the large roots were lower in the stele than in the cortex under the NaCl treatment, which suggested that the endodermis possessed a mechanism to restrict the excess influx of Na⁺ from the cortex into the stele. Based on X-ray micro-analysis, a dense distribution of Na was observed around the endodermis of the large roots. The changes in the Na⁺ concentration in the roots and leaves did not affect the K⁺ distribution to the leaflets and petioles. The effect of the increase of the Na⁺ concentration in the seedlings on Ca²⁺ and Mg²⁺ distribution to the leaflets was small. Regardless of the remarkable decrease in the transpiration rate and slight delay in the emergence of new leaves with the NaCl treatment, there was no significant difference in dry matter weight of the leaflets and petioles at each leaf position. It was, therefore, considered that salt resistance of sago palm might be due to salt avoidance to mechanically restrict an excess of Na distribution in plant tissues and also to maintain the water status in the leaves by restricting the transpiration.

収録刊行物

• Tropical Agriculture and Development

  Tropical Agriculture and Development 52 (1), 7-16, 2008

  日本熱帯農業学会

キーワード

• <I>Metoxylon sagu</I>
• NaCl treatment
• salt avoidance
• salt resistance
• transpiration rate
• X-ray micro-analysis

詳細情報

• CRID: 1390001205298196736
• NII論文ID: 130004544132
• NII論文ID: 40016673962
• NII書誌ID: AA12326645
• DOI: 10.11248/jsta.52.7
• ISSN: 18828469
• ISSN: 18828450
• NDL書誌ID: 10303317
• Web Site: http://id.ndl.go.jp/bib/10303317
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10303317
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可