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Low seed phosphorus concentration depresses early growth and nodulation of narrow-leafed lupin (Lupinus angustifolius cv. Gungurru)
Journal article   Peer reviewed

Low seed phosphorus concentration depresses early growth and nodulation of narrow-leafed lupin (Lupinus angustifolius cv. Gungurru)

B. D. Thomson, R. W. Bell and M. D. A. Bolland
Journal of plant nutrition, Vol.14(12), pp.1355-1367
1991
DOI: https://doi.org/10.1080/01904169109364291
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Abstract

Narrow‐leafed lupin (Lupinus angustifolius L) seed with phosphorus (P) concentrations of 0.21, 0.26 or 0.43% were graded to uniform size (128 ± 5 mg) and grown in two glasshouse experiments to examine the effects of seed P concentration on early shoot, root and nodule growth, and its response to external P supply. Four days after imbibing seeds for a solution culture experiment, whole plant fresh weight (FW) of plants grown from low P seed (0.21%) was depressed compared to that from medium (0.26%) or high (0.43%) P seed. This depression in whole plant FW from growing low P seed persisted to final harvest at day 32 for levels of solution P supply ranging from nil to luxury levels. However, at adequate and luxury levels of solution P relative growth rates of plants grown from low P seed recovered from day 6 onwards to equal those of plants grown from medium and high P seed. In deficient‐P treatments, low P in seed strongly depressed root length, especially that of lateral roots which it did largely by decreasing their number. Low P in seed depressed nodule number and mass at all levels of external P supply but to a greater extent where P supply was deficient for growth. In these deficient‐P treatments, N concentrations in shoots were decreased slightly in plants from low P seed. Seed P may be specifically involved in the early stages of nodule development in lupins. In a P‐deficient loam and a P‐adequate sand, low P in seed depressed early shoot and root growth and nodule formation as it did in solutions. We conclude that tow P concentration in lupin seed may limit successful crop establishment of lupins in the field, especially when P is deficient for plant growth or seedlings are subject to early stresses.

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Source: InCites

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14 Record Views
9 Times Cited - Web of Science

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Citation topics
3 Agriculture, Environment & Ecology
3.45 Soil Science
3.45.473 Soil Phosphorus Dynamics
Web Of Science research areas
Plant Sciences
ESI research areas
Plant & Animal Science
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