不同供磷状况对大麦各部位含磷量的影响 植物 含磷量(umog干物重) 8天P7天-P+1天+P7天-P+3天+P 地上部49(20)151(61) 412(176) 幼叶26(5)684(141)1647(483) 根系43(24)86(48) 169(94) 括号中的数字为相对值:对照为100,即整个实验期持续供给 150μmol/LP。a:不加磷生长8天。b:不加磷生长7天而后补加磷生长 1天。c:不加磷生长7天天而后补加磷生长3天
植物 含磷量（umol/g 干物重）* 8 天-P 7 天-P+1 天+P b 7 天- P b +3 天+P c 地上部 49(20) 151( 61 ) 412(176) 幼叶 26( 5 ) 684(141) 1647(483) 根系 43(24) 86( 48 ) 169( 94 ) 不同供磷状况对大麦各部位含磷量的影响 *括号中的数字为相对值：对照为1 0 0，即整个实验期持续供给 150µmol/LP。a：不加磷生长8天。b：不加磷生长7天而后补加磷生长 1天。c：不加磷生长7天天而后补加磷生长3天
10 1 0.1 胬0.01 0.001 0.010.1110100100 磷浓度(pmol/L) 外界磷浓度对生长4周的8种植物以及生长24 小时的大麦吸磷速率的影响 生长24小时 生长8周
外界磷浓度对生长4周的8种植物以及生长24 小时的大麦吸磷速率的影响 生长24小时 生长8周 0.001 0.01 0.1 1 10 0.01 0.1 1 10 100 1000 磷浓度（µmol/L） 磷吸收率（ µmol/g根鲜重 × h ）
Compartmentation of ions in plant cell Compartmentation(区隔化) of ions and meta bolites in the cell is important for normal meta bolic status Maitainning the extremely low Ca2+(<1 u M) concentration and high K(100-150mM) in cytosol is necessary. The nutrients concentration in the cytosol is regulated by the compartmentation in vacuolar. The vacuolar is thus a storage site from which the main plant nutrients may be mobilized if required for metabolic purpose
Compartmentation ( 区隔化 ) of ions and metabolites in the cell is important for normal metabolic status. Maitainning the extremely low Ca2+ (<1μM) concentration and high K+ (100-150mM) in cytosol is necessary. The nutrients concentration in the sytosol is regulated by the compartmentation in vacuolar. The vacuolar is thus a storage site from which the main plant nutrients may be mobilized if required for metabolic purpose. Compartmentation of ions in plant cell
stele cortex Ion vacuole Ion cytoplasm 根部声子收的馈控模型
[ion] [ion] vacuole cytoplasm cortex stele 根部离子吸收的反馈调控模型
K concentration in sytosol and vacuole of barley root cells as related to the K concentration in the outer solution Fernando et al. 1992) Outer solution Vacuole(mom) Cytosol(moIm 85 44 21 131
K+ concentration in sytosol and vacuole of barley root cells as related to the K+ concentration in the outer solution (Fernando et al. 1992) Outer solution Vacuole (mol/m3 ) Cytosol (mol/m3 ) 1.2 85 144 0.1 61 140 0.01 21 131