PMID- 18208511
OWN - NLM
STAT- MEDLINE
DCOM- 20081027
LR  - 20131121
IS  - 1365-3040 (Electronic)
IS  - 0140-7791 (Linking)
VI  - 31
IP  - 6
DP  - 2008 Jun
TI  - Nitrogen deficiency inhibits leaf blade growth in Lolium perenne by increasing 
      cell cycle duration and decreasing mitotic and post-mitotic growth rates.
PG  - 727-37
LID - 10.1111/j.1365-3040.2008.01787.x [doi]
AB  - Nitrogen deficiency severely inhibits leaf growth. This response was analysed at 
      the cellular level by growing Lolium perenne L. under 7.5 mM (high) or 1 mM (low) 
      nitrate supply, and performing a kinematic analysis to assess the effect of 
      nitrogen status on cell proliferation and cell growth in the leaf blade 
      epidermis. Low nitrogen supply reduced leaf elongation rate (LER) by 43% through 
      a similar decrease in the cell production rate and final cell length. The former 
      was entirely because of a decreased average cell division rate (0.023 versus 
      0.032 h(-1)) and thus longer cell cycle duration (30 versus 22 h). Nitrogen 
      status did not affect the number of division cycles of the initial cell's progeny 
      (5.7), and accordingly the meristematic cell number (53). Meristematic cell 
      length was unaffected by nitrogen deficiency, implying that the division and 
      mitotic growth rates were equally impaired. The shorter mature cell length arose 
      from a considerably reduced post-mitotic growth rate (0.033 versus 0.049 h(-1)). 
      But, nitrogen stress did not affect the position where elongation stopped, and 
      increased cell elongation duration. In conclusion, nitrogen deficiency limited 
      leaf growth by increasing the cell cycle duration and decreasing mitotic and 
      post-mitotic elongation rates, delaying cell maturation.
FAU - Kavanova, Monika
AU  - Kavanova M
AD  - Lehrstuhl fur Grunlandlehre, Technische Universitat Munchen, Am Hochanger 1, 
      D-85350 Freising, Weihenstephan, Germany.
FAU - Lattanzi, Fernando Alfredo
AU  - Lattanzi FA
FAU - Schnyder, Hans
AU  - Schnyder H
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20080117
PL  - United States
TA  - Plant Cell Environ
JT  - Plant, cell & environment
JID - 9309004
RN  - N762921K75 (Nitrogen)
SB  - IM
MH  - Cell Cycle/drug effects/*physiology
MH  - Cell Proliferation
MH  - Lolium/drug effects/growth & development/*metabolism
MH  - Mitosis/drug effects/*physiology
MH  - Nitrogen/*deficiency
MH  - Plant Leaves/*cytology/drug effects/*growth & development
EDAT- 2008/01/23 09:00
MHDA- 2008/10/28 09:00
CRDT- 2008/01/23 09:00
PHST- 2008/01/23 09:00 [pubmed]
PHST- 2008/10/28 09:00 [medline]
PHST- 2008/01/23 09:00 [entrez]
AID - PCE1787 [pii]
AID - 10.1111/j.1365-3040.2008.01787.x [doi]
PST - ppublish
SO  - Plant Cell Environ. 2008 Jun;31(6):727-37. doi: 10.1111/j.1365-3040.2008.01787.x. 
      Epub 2008 Jan 17.