The relative importance of architecture and resource competition in allocation to pollen and ovule number within inflorescences of Hosta ventricosa varies with the resource pools

Cao, Guo‐Xing; Xue, Lin; Li, Yan; Pan, Kaiwen

doi:10.1093/aob/mcr085

Cited by 25 publications

(23 citation statements)

References 53 publications

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“…; Cao et al . ), the patterns of allocation and its adaptive significance are still some of the central questions in plant evolutionary ecology, the answers to which are not only fundamental to the understanding of intra‐individual resource limitation and investment, but also useful in the practice of flower and fruit thinning in agricultural and horticultural studies (e.g. Delgado et al .…”

Section: Introductionmentioning

confidence: 99%

Sequential decline in fruit resource allocation within inflorescences of Sagittaria trifolia: a test of non‐uniform pollination hypothesis

Dai

Wang

et al. 2018

Plant Species Biology

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Flowering plants often exhibit declining resource investment to floral organs, fruits and seeds temporally or spatially in an inflorescence. To account for such variances, non‐uniform pollination hypothesis, which highlights various mating environments each flower experiences, provides adaptive significance for allocation patterns but with controversial supports. Sagittaria trifolia (Alismataceae) was used to examine differences in seed number, seed weight and germination rate among sequential fruits within inflorescences. Ovule number was also investigated to evaluate allocation patterns in the floral stage. To test the non‐uniform pollination hypothesis, we used three polymorphic microsatellite loci of S. trifolia to estimate the seed outcrossing rate in proximal and distal fruits. The results showed that the seed number, average seed weight and seed germination rate of S. trifolia gradually decreased from proximal to distal fruits within inflorescences. The percent of decrease in seed number between two contiguous fruits was 14.68 ± 3.22%, which was much stronger than the percent of decrease in ovule number at 6.95 ± 1.60%. Both proximal and distal fruits within inflorescences had high outcrossing rates (81.5 ± 5.0%, proximal; 82.3 ± 6.9%, distal) and they did not differ significantly. Overall, there was an acropetal decline of resource allocation to fruits within inflorescences of S. trifolia. Allocation pattern to ovules was not a limiting factor for seed production. The lack of difference in outcrossing rate between proximal and distal fruits indicated that the allocation strategy was probably not caused by non‐uniform pollination, but more likely position effects.

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Section: Introductionmentioning

confidence: 99%

Sequential decline in fruit resource allocation within inflorescences of Sagittaria trifolia: a test of non‐uniform pollination hypothesis

Dai

Wang

et al. 2018

Plant Species Biology

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“…is an herbaceous perennial with about 45 species distributed mainly in Japan, as well as a few in China, Korea and Russia (Rao et al, 2012). Hosta ventricosa is the only natural tetraploid species in the genus Hosta (Cao et al, 2011). This species has been widely used in city afforestation, garden landscape and home decoration as a globally important ornamental plant for both beautiful foliage and flowers (Shadrack and Shadrack, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…This species has been widely used in city afforestation, garden landscape and home decoration as a globally important ornamental plant for both beautiful foliage and flowers (Shadrack and Shadrack, 2011). The main reason for its wide cultivation in China is not only for its ornamental value, but also for its consideration as a medicinal herb and its economical value as food (Cao et al, 2011). H. ventricosa is generally easy and long-lived garden plant, relatively disease free, requiring little care other than watering and some fertilizer to enhance growth (http://belflora.com/en/catalog/hosta/).…”

Section: Introductionmentioning

confidence: 99%

“…Commonly, only one or two flowers open on the same day within an inflorescence. However, longevity of individual flowers is only one day (Cao et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…The flowers of H. ventricosa produce nectar and have six tepals, six stamens of similar size, and a gynoecium consisting of three carpels. They produce seed by pseudogamous apomixis (Cao et al, 2011). The role of ethylene in its flower senescence is unclear.…”

Section: Introductionmentioning

confidence: 99%

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Ethylene Production and Expression of Two Ethylene Biosynthetic Genes in Senescing Flowers of Hosta ventricosa

Zhu¹,

Hu²,

Guo³

et al. 2014

HST

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Senescence of Hosta ventricosa flowers was firstly characterized as ethylene-sensitive since the deterioration of the tepal was accompanied by increased endogenous ethylene biosynthesis. The full-length cDNAs and DNAs of 1-aminocyclopropane-1-carboxylic acid (ACC) synthase (ACS) and ACC oxidase (ACO) involved in ethylene biosynthesis were cloned from H. ventricosa flowers. The HvACS ORF with 1347 bp and two introns, encoded a polypeptide of 448 amino acids showing 79% homology with that in Musa acuminata. The HvACO ORF contained 957 bp and three introns, encoding a 318-residue polypeptide showing 83% homology with that in Narcissus tazetta. The timing of the induction of HvACS expression was in correspond to the timing of the increase in ethylene production, and that the up-regulation of HvACO transcript was closely correlated with an elevated ethylene production, but underwent a down-regulation in wounded leaves with elevated ethylene emission. The results, together with expression analysis in vegetative tissues, suggested that both HvACS and HvACO were specifically regulated by flower senescence.

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Architectural effects regulate resource allocation within the inflorescences with nonlinear blooming patterns

Wang

Zhang

et al. 2022

American J of Botany

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Premise Spatial and temporal resource allocations within inflorescences have been well‐studied in many plants based on flowering sequence or floral position. However, there had been few attempts to investigate architectural effects and resource competition in species where the blooming pattern does not follow a linear positional pattern within the inflorescence. Moreover, most flowering plants show female‐biased sex allocation in early or basal flowers, but it is unclear in species with inherent and changeless ovule production. Methods We investigated intra‐inflorescence variation in reproductive traits of Salvia przewalskii, a perennial herb with 4‐ouvle ovary flowers and flowering sequence–floral position decoupled inflorescences. To detect the effects of resource competition and architectural effects on reproductive success, we manipulated inflorescence (removed floral buds by position and flowering sequence) and pollination (opened and supplemented pollination). Results Pollen production and dry mass deceased from bottom to top flowers but did not significantly differ following flowering sequence, resulting in male‐biased sex allocation in basal flowers. The seed production, fruit set, and bud development exhibited significant declining trends from proximal to distal positions regardless of the thinning and pollen treatments. Meanwhile, the seed production, fruit set, and bud development success did not significant differ when thinning was conducted according to flowering sequence. Conclusions Architectural effects plays a crucial role in resource allocation within decoupled flowering inflorescences. Moreover, our results highlighted that inherent floral traits such as changeless ovule production, may modify architectural effects on sex allocation.

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The relative importance of architecture and resource competition in allocation to pollen and ovule number within inflorescences of Hosta ventricosa varies with the resource pools

Abstract: In flowering plants, the relative importance of architecture and resource competition in allocation to pollen and ovules may vary with the resource pools or the overall resource availability of maternal plants.

Cited by 25 publications

References 53 publications

Sequential decline in fruit resource allocation within inflorescences of Sagittaria trifolia: a test of non‐uniform pollination hypothesis

Sequential decline in fruit resource allocation within inflorescences of Sagittaria trifolia: a test of non‐uniform pollination hypothesis

Ethylene Production and Expression of Two Ethylene Biosynthetic Genes in Senescing Flowers of Hosta ventricosa

Architectural effects regulate resource allocation within the inflorescences with nonlinear blooming patterns

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