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A long‐wavelength absorbing form of protochlorophyll and crystalloids in the inner seed coat of Luffa cylindrica
Author(s) -
Sundqvist Christer,
Ryberg Hans
Publication year - 1983
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1983.tb06568.x
Subject(s) - coat , pigment , botany , acetone , stalk , biology , horticulture , chemistry , biochemistry , paleontology , organic chemistry
The inner seed coat of seeds of Luffa cylindrica (L.) Roem. (cv. Luffa sponge vine) was used to study the development of the protochlorophyll‐containing plastids during different stages of maturity of the fruits. The inner seed coats had an absorption spectrum with a main peak in the red region at 675 nm and a shoulder at 630 nm. The fourth derivative spectrum gave a clear peak at 630 nm and also a small additional peak at 650 nm. An acetone extract showed a peak at 626 nm and a Soret band at 440 nm indicating that the main pigment in the seed coat was protochlorophyll. The ultrastructure of the protochlorophyll‐containing plastids changed during maturation of the seed. In the young stage an elaborate membrane system was present. In a more mature stage the membrane system degenerated and crystalloids were formed. Some of these crystalloids seemed to develop into plastoglobuli in the most mature stage.