Seed development and maturation in early spring-flowering Galanthus nivalis and Narcissus pseudonarcissus continues post-shedding with little evidence of maturation in planta

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Seed development and maturation in early spring-flowering Galanthus nivalis and Narcissus pseudonarcissus continues post-shedding with little evidence of maturation in planta

Rosemary J. Newton [et al.] - Nama Orang;

† Background and Aims:
Seeds of the moist temperate woodland species Galanthus nivalis and Narcissus pseudonarcissus, dispersed during spring or early summer, germinated poorly in laboratory tests. Seed development and maturation were studied to better understand the progression from developmental to germinable mode in order to improve seed collection and germination practices in these and similar species.

† Methods:
Phenology, seed mass, moisture content and ability to germinate and tolerate desiccation were monitored during seed development until shedding. Embryo elongation within seeds was investigated during seed development and under several temperature regimes after shedding.

† Key Results:
Seeds were shed at high moisture content (>59 %) with little evidence that dry mass accumulation or embryo elongation were complete. Ability to germinate developed prior to the ability of some seeds to tolerate
enforced desiccation. Germination was sporadic and slow. Embryo elongation occurred post-shedding in moist
environments, most rapidly at 20 oC in G. nivalis and 15 oC in N. pseudonarcissus. The greatest germination
also occurred in these regimes, 78 and 48 %, respectively, after 700 d.

†Conclusions Seeds of G. nivalis and N. pseudonarcissus were comparatively immature at shedding and substantial
embryo elongation occurred post-shedding. Seeds showed limited desiccation tolerance at dispersal.
Key words: Amaryllidaceae, germination, Galanthus nivalis, Narcissus pseudonarcissus, seed development,
desiccation tolerance, embryo growth, temperate woodland geophytes.

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Informasi Detail

Judul Seri: Annals of Botany
No. Panggil: -
Penerbit: Oxford : Oxford University Press on behalf of the Annals of Botany Company., 2013
Deskripsi Fisik: Annals of Botany 111: 945–955, 2013
Bahasa: English
ISBN/ISSN: -
Klasifikasi: -
Tipe Isi: -
Tipe Media: -
Tipe Pembawa: -
Edisi: 111: 2013
Subjek: EKOFISIOLOGI TANAMAN
Info Detail Spesifik: -
Pernyataan Tanggungjawab: agus

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Seed development and maturation in early spring-flowering Galanthus nivalis and Narcissus pseudonarcissus continues post-shedding with little evidence of maturation in planta

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