Nitrogen deficiency slows leaf development and delays flowering in narrow-leafed lupin
Ma, Q., Longnecker, N. and Dracup, M. (1997) Nitrogen deficiency slows leaf development and delays flowering in narrow-leafed lupin. Annals of Botany, 79 (4). pp. 403-409.
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Effects of nitrogen (N) supply on leaf and flower development in Lupinus angustifolius L. cv Merrit were examined in a temperature-controlled glasshouse. Low N supply (0.05 or 0.4 mM N) had little effect on leaf initiation but slowed leaf emergence on the main stem compared with plants receiving high N supply (6.0 or 6.4 mM N), or with symbiotic N2-fixation. Plants experiencing transient N deficiency had slower leaf emergence than plants with a continuous supply of 6.4 mM N. Nitrogen supply did not affect the time of floral initiation, which occurred within 4 weeks of sowing, by which time nine to ten leaves had emerged. However, the flowering of low-N plants was delayed by 68 to 220 °C d (i.e. 4.14 d) even though they had fewer leaves. The effect of N deficiency on flowering time was largely a result of slower leaf emergence.
|Publication Type:||Journal Article|
|Publisher:||Oxford University Press|
|Copyright:||© Annals of Botany Company|
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