Na+/K+ selectivity of leaf sheath in wheat cultivars differing in salt tolerance.
A salt-tolerant wheat cultivar (DK961) and a salt-sensitive one (LM15) were exposed to 200 mmol/L NaCl for 3 d to study selectivity in transport of K(+) and Na(+) of the leaf sheath. Na(+) content of leaf sheath and K(+) content of leaf blade of DK961 were significantly higher than those of LM15, which led to a lower Na(+)/K(+) ratio of leaf blade of DK961 than that of LM15. These results suggested that leaf sheath of DK961 had much stronger abilities of limiting Na(+) transport and allowing K(+) transport from leaf sheath to leaf blade than that of LM15 to maintain lower Na(+)/K(+) ratio of leaf blade under NaCl stress, indicating that leaf sheath may play an important role in wheat salt tolerance.
Ding
Tong-Lou
TL
College of Life Sciences, Shandong Normal University, Jinan 250014, China.
Duan
Pei
P
Wang
Bao-Shan
BS
D001692:Biological Transport / Q000187:drug effects / Q000502:physiology; D009997:Osmotic Pressure / Q000187:drug effects; D018515:Plant Leaves / Q000187:drug effects / Q000378:metabolism; D018517:Plant Roots / Q000378:metabolism; D011188:Potassium / Q000378:metabolism*; D055049:Salt Tolerance / Q000502:physiology*; D012964:Sodium / Q000378:metabolism*; D012965:Sodium Chloride / Q000494:pharmacology*; D014908:Triticum / Q000254:growth & development* / Q000502:physiology
D012965:Sodium Chloride; D012964:Sodium; D011188:Potassium