REPRODUCTIVE BIOLOGY OF <i>STELLARIA LONGIPES</i> GOLDIE AS REVEALED BY A CULTIVATION EXPERIMENT

Philipp, Marianne

doi:10.1111/j.1469-8137.1980.tb00771.x

Cited by 56 publications

(49 citation statements)

References 26 publications

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“…Nevertheless, due to their greater flower production, male steriles in this species produce more seeds than hermaphrodites (Philipp, 1980). This situation is similar to that for MS2, except that MS2 plants appear to have no advantage over hermaphrodites because the difference in seed production between sex types was not significant.…”

Section: Discussion (I) Differences In Sexual Reproductionsupporting

confidence: 57%

“…In some species differences in seed number per flower appeared to be very large and in favour of male steriles, from which subdioecy was concluded (Burrows, 1960;Arroyo and Raven, 1975;Webb, 1979). In other species, differences between the two forms were less extreme and the contribution of the various components of seed weight production to these differences varied from species to species (Assouad et a!., 1978;Philipp, 1980;Vaarama and Jäãskelflinen, 1967). However, not only the size of these differences but also their origin is important.…”

Section: Introductionmentioning

confidence: 99%

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Gynodioecy in Plantago lanceolata L. III. Sexual reproduction and the maintenance of male steriles

Vandamme

1984

Heredity

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SUMMARYThe importance of the reproductive part of the life cycle for the maintenance of the gynodioecious breeding system in Plantago Ianceolata has been studied. Two male sterility types (MS 1, MS2). the corresponding partial male sterility types or intermediates (IN1, 1N2) and hermaphrodites (H) have been compared in four populations for seed production (ovule production [1 female fertility) and weight per seed. MS1 plants produce more and heavier seeds than hermaphrodites. MS2 produces more ovules than H, but it is partially female sterile, so that seed production does not differ significantly between the two phenotypes. Because MS2 in addition has a lower weight per seed, it has no advantage in reproduction via seeds over any other sex type. The results for the intermediate sex types indicate that overdominance at sex determining loci may be involved in the maintenance of MS2. Reproductive differences between genotypes within the H phenotype have been found in a cultivation experiment, in accordance with theoretical models, which concerns variation in pollen production, associated with plasmon type. The mechanism of partial female sterility is discussed. The observed differences between sex types are interpreted as pleiotropic effects of the male sterility genes. It is argued that while the differences between male steriles and hermaphrodites in sexual reproduction contribute to the maintenance of gynodioecy, they probably do not explain it fully.

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Section: Discussion (I) Differences In Sexual Reproductionsupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Gynodioecy in Plantago lanceolata L. III. Sexual reproduction and the maintenance of male steriles

Vandamme

1984

Heredity

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“…On the other hand, in P. coronopus, PMS frequencies in the field are of the same order as in the crosses in the garden (Koeiewijn & Van Damme, 19956). It is, therefore, striking that many authors working with other gynodioecious species either do not mention the existence of PMS Philipp (1980) Correns (1928) Correns (1928 (e.g. Rushton (1983), who also studied male sterility in P. coronopus) or state that PMS is unimportant.…”

Section: Partial Male Sterilitymentioning

confidence: 99%

Gender variation, partial male sterility and labile sex expression in gynodioecious Plantago coronopus

Koelewijn

Damme

1996

New Phytologist

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Sl'MMAKVGynodioecy is a breeding system consisting of male steriles (MS, females) and hermaphrodites (H), Tbere is how ever within such systems a third, often neglected, class of partially male sterile plants (PMS), i,e, plants with an intermediate sex expression. In tiatural populations of Plantaf;o coronopus, partially male sterile individuals were as common as male steriles (frequencies in tbe range 1'7 36-8",,). These PMS plants constitute a continuous series, linking compk-te male sterility and hermaphroditism. We discovered that temperature influenced sex expression and the degree of male sterilit\ of PMS indi\iduals, but not of AIS and H individuals. Thus, at higher temperatures PMS individuals became more male sterile. Difference in c\ toplasmic background ofthe indi\'iduats did not infiuence their response to temperature. IT is argued tbat partial male sterility is a normal feature of eytiodioecious species and not an abnormality,

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“…The criteria employed for estimation of reproductive effort have not been identified unequivocally. Different workers have employed different measures like, (i) crude general estimates as leaf area, number of flowers, seeds or fruits, and pollen-ovule ratio (Primack 1979, Lord 1980, Philipp 1980, Spira 1980, (ii) analysis of chemical components of tissues (Paine 1971, Reekie and Bazzaz 1987, Dunn and Sharitz 199-l , KovacR et a/. 1992, Delph et a/.…”

Section: Discussionmentioning

confidence: 99%

Pattern of Resource Allocation of Six Plantago Species with Different Breeding Systems

1999

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Species of Plantago exhibit great deal of differences in the breeding system. The reproductive effort calculated on the basis of, (i) dry biomass of foliar and floral parts and (ii) seed output-weight (mg) per unit leaf area (cm2), exhibits relation with breeding system. The predominantly inbreeding taxa invest higher reproductive effort compared to their outbreeding allies. In terms of sex allocation strategies, the outbreeding species like f . lamlafa, f , lasopus invest more to the development of floral features and to male functions. On the contrary, inbreeding species such as f . pafagmica, f. drummondii, and f . ovata invest greater resources to the female function.

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REPRODUCTIVE BIOLOGY OF STELLARIA LONGIPES GOLDIE AS REVEALED BY A CULTIVATION EXPERIMENT

Cited by 56 publications

References 26 publications

Gynodioecy in Plantago lanceolata L. III. Sexual reproduction and the maintenance of male steriles

Gynodioecy in Plantago lanceolata L. III. Sexual reproduction and the maintenance of male steriles

Gender variation, partial male sterility and labile sex expression in gynodioecious Plantago coronopus

Pattern of Resource Allocation of Six Plantago Species with Different Breeding Systems

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