Seed manganese affects the early growth of lupins in manganese-deficient conditions [Lupinus angustifolius]
1994
Crosbie, J. | Longnecker, N.E. | Robson, A.D. (Western Australia Univ., Nedlands. School of Agriculture)
Poor crop establishment and split seed associated with Mn deficiency are major problems in the production of narrow-leafed lupins in Western Australia. A survey of Western Australian seed producers indicated that Mn concentrations in lupin seeds ranged from 8 to 62 mg per kg, with the majority of the seed containing less than 20 mg per kg. Seedling growth of lupins (cultivars Gungurru and Danja) was studied in nutrient solution, from seed with Mn concentrations ranging from 8 to 223 mg per kg. With adequate external Mn supply there was no effect of seed Mn on growth of plants grown from undamaged seedlings. Shoot weight of Gungurru lupins 42 days after imbibing increased with increasing seed Mn concentration up to about 55 mg per kg when grown without added Mn. Growth of Danja plants increased similarly with increasing seed Mn concentration.
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