
TY  - JOUR
A1  - Davies, C. L. 
A1  - Turner, D. W. 
A1  - Dracup, M. 
T1  - Yellow lupin (<emph type="2">Lupinus luteus</emph>) tolerates waterlogging better than narrow-leafed lupin (<emph type="2">L. angustifolius</emph>) II. Leaf gas exchange, plant water status, and nitrogen accumulation
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 2000
VL  - 51
IS  - 6
SP  - 711
EP  - 719
KW  - photosynthesis, transpiration, stomatal conductance, leaf water potential.
UR  - https://doi.org/10.1071/AR99074 
N2  - Yellow lupin (Lupinus luteus) may have potential as a legume crop in waterlogging-prone areas of Western Australia. To elucidate the physiological response of yellow lupin and the widely grown narrow-leafed lupin (L. angustifolius) to transient waterlogging we conducted experiments in controlled environments. Narrow-leafed lupin and yellow lupin were grown in pots and waterlogged for 14 days from 28 to 42, or 56 to 70 days after sowing, each being followed by a 14-day recovery period. Root and shoot growth responses, leaf gas exchange, water relations, and N accumulation were assessed. During the period of waterlogging, net nitrogen accumulation ceased in both species at both ages. During recovery, yellow lupin accumulated more nitrogen than narrow-leafed lupin. Waterlogging reduced leaf gas exchange more with older plants than with younger plants, and more so with narrow-leafed lupin than yellow lupin. Some components of leaf gas exchange, particularly leaf conductance, were reduced by up to 80%. Waterlogging had no effect on leaf water potential of yellow lupin but reduced it in narrow-leafed lupin, from about &#8211;450 to &#8211;1100 kPa, especially during the recovery period. Yellow lupin was more adapted to transient waterlogging than narrow-leafed lupin because it maintained its leaf water status, it accumulated more nitrogen during recovery, and its photosynthetic activity recovered quickly afterremoval of waterlogging. 
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