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.
College of Life Sciences, Shandong Normal University, Jinan 250014, China.
Tong-Lou
TL
Ding
Pei
P
Duan
Bao-Shan
BS
Wang
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