Relationship Between Seed Mass and Young-Seedling Growth and Morphology Among Nine Bluebunch Wheatgrass Populations

Bidens pilosa L. is a summer annual that shows a particular phenological pattern in the Córdoba mountains, Argentina. Some individuals start flowering 1 month after germination (early type), but most of the population starts flowering 4 months after germination (normal type). The aims of this study were to (1) analyse whether differences in flowering phenology affect seed mass and seed production, and (2) assess whether possible differences in seed traits of the two parental phenological types would affect germinability, germination rate, seedling growth and flowering phenology of offspring under laboratory conditions. The study showed that the numbers of seeds per capitulum and per plant were greater in the normal type than in the early type plants. This can be related to plant height, since in the field, normal-type plants are larger than early type plants. However, early type plants produced heavier seeds than normal-type plants. Germination rate was faster in the early type seeds, but total germination was higher in the normal ones. Seedling growth, in terms of height and the date of first flowering, did not differ between the phenological types of parental seed sources. Our results showed that differences in flowering phenology were associated with seed mass and seed production differences. Seed mass appears to be related to germination characteristics but not to seedling growth nor to flowering phenology of offspring.

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Seedling growth analysis of Russian wildrye

Canadian Journal of Plant Science ◽

10.4141/cjps93-132 ◽

1993 ◽

Vol 73 (4) ◽

pp. 1009-1015 ◽

Cited By ~ 6

Author(s):

Paul G. Jefferson

Keyword(s):

Seedling Growth ◽

Root Length ◽

Carbon Allocation ◽

Seed Mass ◽

Specific Root Length ◽

Crested Wheatgrass ◽

Breeding Lines ◽

Seedling Growth Rate ◽

Russian Wildrye ◽

High Tillering

Tetracan, a recently released tetraploid cultivar of Russian wildrye (Psathyrostachys juncea (Fisch.) Nevski), has larger seed mass and better emergence from seeding depth than diploid cultivars. The objective of this research was to compare the seedling growth of Russian wildrye with crested wheatgrass (Agropyron desertorum (Fisch. ex Link) Schultes), Nordan and second to compare Tetracan Russian wildrye with two diploid Russian wildrye cultivars, Mayak and Swift. Seedlings were destructively harvested at 28, 42, 56, and 70 d after planting (DAP) in the greenhouse. Crested wheatgrass had greater seedling biomass in shoot and root, higher tiller number, and a more efficient root system than the Russian wildrye. Tetracan had fewer, larger tillers with larger leaves and greater root length than the two diploid cultivars. These results document that the tetraploid cultivar Tetracan has a different pattern of tiller initiation and growth than the diploid cultivars. Seedling growth rate and biomass yield (seedling vigor) of tetraploid Russian wildrye could be improved through polyploidization with high tillering diploid breeding lines as parents and selection for large tiller size (similar to Tetracan) while maintaining high tillering capacity. Key words: Specific root length, leaf area, tillering, carbon allocation

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Effect of seed position and soil nutrients on seed mass, germination and seedling growth in Peucedanum oreoselinum (Apiaceae)

Scientific Reports ◽

10.1038/s41598-017-02035-1 ◽

2017 ◽

Vol 7 (1) ◽

Cited By ~ 19

Author(s):

Jeremi Kołodziejek

Keyword(s):

Soil Nutrients ◽

Seedling Growth ◽

Seed Mass ◽

Seed Position

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Diffuse knapweed and bluebunch wheatgrass seedling growth under stress.

Journal of Range Management ◽

10.2458/azu_jrm_v56i1_kiemnec ◽

2006 ◽

Vol 56 (1) ◽

Author(s):

G. Kiemnec ◽

L.L. Larson ◽

A. Grammon

Keyword(s):

Seedling Growth ◽

Bluebunch Wheatgrass ◽

Diffuse Knapweed

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Collection Age and Seed Mass Influence Germination and Seedling Growth in Midwestern White Spruce Accessions

Forest Science ◽

10.1093/forsci/fxab038 ◽

2021 ◽

Author(s):

Brian M Connolly

Keyword(s):

Growth Rate ◽

Seedling Growth ◽

Seed Mass ◽

Seed Viability ◽

Germplasm Conservation ◽

White Spruce ◽

Seedling Vigor ◽

Nursery Production ◽

Seedling Growth Rate ◽

Unites States

Abstract Stored tree seed collections are essential resources for seedling production and conserving unique germplasm. As stored seeds age, however, seed viability and seedling vigor can decline. This study tests how age and seed mass correspond to germination dynamics and seedling vigor in four white spruce collections from the upper midwestern Unites States. Using two seedling growth experiments, this study demonstrates that white spruce seeds stored for >30 years have low seed viability and slower seedling growth rates compared with seeds from more recent (≤10 years) white spruce collections. Seed mass also predicted seedling growth rate regardless of collection age, suggesting larger seeds from older collections generate faster growing seedlings. Study Implications: Efficient use of stored tree seeds saves nursery managers time and resources. White spruce is a collection priority, but management needs to know how seed viability and seedling vigor decline during storage. Diminished germination and seedling growth after >30 years in storage suggests older collections are most appropriate for germplasm conservation and underscore the importance of testing stored seed prior to nursery production. For collections stored <10 years, larger seeds germinate more readily than smaller seeds and produce faster growing seedlings. For older collections, seed mass does not correspond with germination, but seedling growth rate positively correlated with seed mass.

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