PMID- 18275460
OWN - NLM
STAT- MEDLINE
DCOM- 20080310
LR  - 20220409
IS  - 1399-3054 (Electronic)
IS  - 0031-9317 (Linking)
VI  - 132
IP  - 3
DP  - 2008 Mar
TI  - The cooperative relation between non-hydraulic root signals and osmotic 
      adjustment under water stress improves grain formation for spring wheat 
      varieties.
PG  - 283-92
LID - 10.1111/j.1399-3054.2007.01007.x [doi]
AB  - Non-hydraulic root signals (nHRS) and osmotic adjustment (OA) are two important 
      adaptive responses of plants to water stress. There is little understanding of 
      their relationships during water stress. The threshold range of soil water 
      potential to occurrence of nHRS, the capacity for OA, grain yield and water use 
      efficiency (WUE) were examined in three spring wheat (Triticum aestivum L.) 
      varieties (two bred after 1975 and one bred before 1900) under water stress 
      conditions. The threshold range of nHRS was significantly correlated with the 
      maintenance rate of grain yield (MRGY) (r = 0.99, P < 0.05) under moderate 
      drought (-0.49 to -0.55 MPa) but not under severe drought (-0.70 to -0.76 MPa). 
      There were similar correlations between OA and the MRGY. However, regulation of 
      nHRS precedes OA during gradual water stress. The threshold range of nHRS and OA 
      was positively correlated (r = 0.93, P < 0.05), suggesting a mechanism for 
      adapting to drought. WUE was higher for modern than for old varieties and was 
      correlated with the root efficiency (full biomass weight including root per root 
      weight, r = 0.78, P < 0.05) and the root water uptake efficiency (water 
      consumption per root weight, r = 0.72, P < 0.05). However, there was a 
      significant negative correlation between WUE and root weight (r = -0.84, P < 
      0.01). The cooperative relationship between the threshold range of nHRS and OA 
      under water stress was beneficial for improving grain formation for spring wheat 
      varieties.
FAU - Fan, Xian-Wei
AU  - Fan XW
AD  - MOE Key Laboratory of Arid Agroecology, School of Life Science, Lanzhou 
      University, Lanzhou 730000, China.
FAU - Li, Feng-Min
AU  - Li FM
FAU - Xiong, You-Cai
AU  - Xiong YC
FAU - An, Li-Zhe
AU  - An LZ
FAU - Long, Rui-Jun
AU  - Long RJ
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Denmark
TA  - Physiol Plant
JT  - Physiologia plantarum
JID - 1256322
RN  - 059QF0KO0R (Water)
SB  - IM
MH  - Acclimatization
MH  - Biomass
MH  - Disasters
MH  - Osmosis
MH  - Plant Roots/metabolism
MH  - Signal Transduction
MH  - Triticum/*growth & development/*metabolism
MH  - Water/metabolism
EDAT- 2008/02/16 09:00
MHDA- 2008/03/11 09:00
CRDT- 2008/02/16 09:00
PHST- 2008/02/16 09:00 [pubmed]
PHST- 2008/03/11 09:00 [medline]
PHST- 2008/02/16 09:00 [entrez]
AID - PPL1007 [pii]
AID - 10.1111/j.1399-3054.2007.01007.x [doi]
PST - ppublish
SO  - Physiol Plant. 2008 Mar;132(3):283-92. doi: 10.1111/j.1399-3054.2007.01007.x.