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Influence of Water Stress on the Chemical Composition of Seeds of Two Lupins ( Lupinus albus and Lupinus mutabilis )
Author(s) -
Carvalho I. S.,
Chaves M.,
Pinto Ricardo C.
Publication year - 2005
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.2004.00128.x
Subject(s) - raffinose , lupinus , stachyose , biology , sugar , dry weight , sucrose , agronomy , botany , anthesis , horticulture , food science , cultivar
We have performed chemical proximate analysis and determined the carbohydrate profile of mature seeds of Lupinus albus , cv. Rio Maior and Lupinus mutabilis , cv. Potosi plants, either well watered (ww) or subjected to a water‐stress period (imposed from the 15th to 35th day after anthesis). Protein content from lupin seeds was 450 and 320 g kg −1 of seed on dry weight basis, for ww plants, respectively, of L. albus and L. mutabilis . Water stress did not affect protein content. The oil content of ww plants was about 120 g kg −1 of seed dry weight for L. albus and 180 g kg −1 of seed dry weight for L. mutabilis . Water stress reduced those values of half. The sugar content was about 90 g kg −1 for L. albus and 50 g kg −1 of seed dry weight for L. mutabilis , in ww plants. Water stress led to an increase in sugar content to 200 and 130 g kg −1 of seed dry weight, respectively, for L. albus and L. mutabilis . The α ‐galactosides amounted to 70 % of the total sugars (raffinose being 30 % and stachyose, 40 %) and sucrose was about 20 % of the total sugars. Water stress increased total carbohydrates and increased the sucrose/ α ‐galactoside ratio, although reducing raffinose content and increasing sucrose content.