Yang Niu

Yang Niu
Chinese Academy of Sciences | CAS · Kunming Institute of Botany

PhD

About

41
Publications
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634
Citations
Introduction
Yang Niu currently works at the Kunming Institute of Botany, Chinese Academy of Sciences. Yang does research in Evolutionary Biology, Ecology and Botany.

Publications

Publications (41)
Article
Pollination niche shifts can drive remarkable floral divergence between closely related plant species. The Leucolirion clade of Lilium contains species with either tepal-recurved or trumpet-shaped flowers. The tepal-recurved flowers are bright orange and might be pollinated by butterflies and/or birds. The trumpet-shaped flowers are mostly pale and...
Article
Pollination niche shifts can drive remarkable floral divergence between closely related plant species. The Leucolirion clade of Lilium contains species with either tepal-recurved or trumpet-shaped flowers. The tepal-recurved flowers are bright orange and might be pollinated by butterflies and/or birds. The trumpet-shaped flowers are mostly pale and...
Article
Sexual interference between male and female function in hermaphrodite plants is reduced by protandry. In environments with insufficient pollinator service, prolongation of male function owing to limited pollen removal could restrict the duration of female function and lower seed production. We provide evidence that this form of sexual conflict has...
Article
Full-text available
Sexual interference between male and female function in hermaphrodite plants is reduced by protandry. In environments with insufficient pollinator service, prolongation of male function owing to limited pollen removal could restrict the duration of female function and lower seed production. We provide evidence that this form of sexual conflict has...
Article
Color in nature mediates numerous among and within species interactions,¹ and anthropogenic impacts have long had major influences on the color evolution of wild animals.² An under-explored area is commercial harvesting, which in animals can exert a strong selection pressure on various traits, sometimes greater even than natural selection or other...
Preprint
Sexual interference between male and female function in hermaphrodite plants is reduced by protandry. In environments with insufficient pollinator service, prolongation of male function owing to limited pollen removal could restrict the duration of female function and lower seed production. We provide evidence that this form of sexual conflict has...
Article
Full-text available
Mimicry of non‐rewarding flowers to rewarding flowers has been accepted as a strategy to improve pollination success in angiosperms. It has been proposed that this mechanism depends on whether potential pollinators can discriminate between the flowers. In this study, the intersexual mimicry and deceit pollination were studied in a threatened dioeci...
Article
Full-text available
Aims Bee-pollinated flowers are rarely red, presumably because bees (which lack red receptors) have difficulty detecting red targets. Although the response of bees to red colour has been investigated in lab experiments, most stimuli have been pure red, while the subtle diversity of red as perceived by humans (human-red) has received very limited at...
Article
Full-text available
Background and aims: Floral colour is a primary signal in plant-pollinator interactions. The association between red flowers and bird pollination is well known, explained by the "bee avoidance" and "bird attraction" hypotheses. Nevertheless, the relative importance of these two hypotheses has rarely been investigated on a large scale, even in term...
Article
Full-text available
A biological trait may promote adaptation to particular pollinators, and this may be a major factor governing the variation of pollination systems among angiosperm taxa. For instance, one long-standing hypothesis is that compared with superior ovaries, inferior ovaries of angiosperm flowers may be protected from damage by visiting bird bills and, t...
Article
Camouflage is a key defensive strategy in animals, and it has been used to illustrate and study evolution for 150 years. It is now evident that many camouflage concepts likely also apply to plants, attracting greatly increased attention. Here, we review the hypotheses and evidence for different camouflage strategies used by plants and conceptualise...
Article
Full-text available
The efficacy of camouflage through background matching is highly environment-dependent, often resulting in intraspecific colour divergence in animals to optimize crypsis in different visual environments. This phenomenon is largely unexplored in plants, although several lines of evidence suggest they do use crypsis to avoid damage by herbivores. Usi...
Article
Full-text available
Although hermaphroditism is common in flowering plants, unisexual flowers occur in many plant taxa, forming various sexual systems. However, the sexual system of some plants is difficult to determine morphologically, given that their sex expression may be influenced by both genetic and environmental factors. Specifically, androdioecy (the coexisten...
Article
Full-text available
Key message Sex allocation in Cyananthus delavayi. Abstract Gynodioecy, where females and hermaphrodites coexist in the same natural population, is particularly suitable for predicting the ecological pressures that drive the stability of gender polymorphism. Since females have a disadvantage in that they only contribute to the next generation via...
Article
Full-text available
Background: Seed quality can directly determine the survival and population dynamics of alpine plant species. However, how the quality of seeds is affected by elevation-related stress in the Hengduan mountains in the South-western China remains unclear. Aims: To determine how the seed quality of species of Cyananthus varies with elevation, life his...
Article
Full-text available
Extrafloral structures are supposed to have evolved to protect flowers from harsh physical environments but might have effects on pollination. Overlapping leaves cover flowers in Eriophyton wallichii, an alpine perennial endemic to the Himalaya-Hengduan Mountains. In previous study, it has showed that these extrafloral leaves can protect interior f...
Article
Full-text available
That stalks reorient after flowering to face upwards is a common phenomenon in many flowering plants, indicating the potential importance of fruit orientation on seed dispersal. But this idea has not been subject to an empirical test. We examined this hypothesis by analysing the evolutionary correlation between fruit orientation and other character...
Article
Full-text available
Sexual allocation pattern is considered highly relevant for the maintenance of females in the process of evolution from hermaphrodites to dioecy. Theoretical and empirical studies predict that gynodioecious plants should invest more resources in male function under harsher environments and/or when female frequency is higher; and that there are trad...
Article
In this study, floral color, scent composition and emission rate, nectar property, pollinators, and breeding system of dimorphic Buddleja delavayi were investigated. Flower color of B. delavayi was determined using a Standard Color Chart and spectrophotometer, and two distinct color polymorphisms were observed having purple or white flowers. Floral...
Article
Full-text available
Aims It is generally accepted that visual displays and floral scent play important roles in communication between flowering plants and their pollinators. However, the relative role of visual and olfactory cues in pollinator attraction is largely unknown. In this study, we determined the roles of both types of cue in attracting pollinators to Cornus...
Article
Full-text available
Aims Studying the ecological significance of highly specialized morphological traits evolved by alpine plants could help us to understand the adaptation and evolution of these plants under severe alpine environment. We explored the adaptive significance of woolly and overlapping leaves for reproduction in Eriophyton wallichii, a perennial herb nati...
Article
Full-text available
The floral traits of bisexual flowers may evolve in response to selection on both male and female functions, but the relative importance of selection associated with each of these two aspects is poorly resolved. Sexually dimorphic traits in plants with unisexual flowers may reflect gender-specific selection, providing opportunities for gaining an i...
Article
Full-text available
Like animals, plants are attacked by enemies (herbivores) that forage using visual cues; however, the defensive coloration type known as cryptic coloration was rarely reported in plants. For most autotrophic plants, because photosynthesis relies on the presence of chlorophyll, a green leaf appearance is standard. However, if having leaves that are...
Article
Pollinating seed-consuming mutualisms are regarded as exemplary models for studying coevolution, but they are extremely rare. In these systems, olfactory cues have been thought to play an important role in facilitating encounters between partners. We present a new pollinating seed-consuming mutualism from the high Himalayas between the endemic herb...
Article
Cryptic colouration is a common predation-avoidance strategy in animals that is postulated to occur in plants, but few experimental studies have rigorously tested this hypothesis.We investigated the colouration of Corydalis benecincta, an alpine plant with remarkably dimorphic leaf colours (grey and green), based on a cost–benefit analysis. First w...
Article
Full-text available
The Qinghai-Tibet Plateau (QTP) is the highest and largest plateau in the world. It covers correspondingly wide geological, topographical and climatic gradients, and thus hosts greater biodiversity than surrounding lowlands and other high elevation regions. Due to its extreme environmental and biological diversity, the QTP is an ideal region for st...
Article
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Chromosome numbers and the morphology of members of 24 populations representing 15 species of the Sino-Himalayan endemic genus Cyananthus (Campanulaceae) were studied using karyological and numerical taxonomic techniques. The chromosome numbers of these taxa are 2n = 10, 12, 14, 24, 28, and the basic chromosome numbers for the genus are x = 5, 6, 7...
Article
Full-text available
Plant sexual systems can be affected by various environmental factors, and thus show a range of morphological differences. The associations between plant sexual systems and morphology are unique, for example, the subnival belt of the Hengduan Mountains has harsh climatic conditions, but hosts remarkable biodiversity. However, these associations hav...
Article
To better understand the elevational pattern of phylogenetic structure shown by alpine taxa and the underlying causes, we analyzed the phylogenetic structure of each elevational belt of alpine plants in the Hengduan Mountains Region, measured by net related index (NRI) and net nearest taxon index (NTI). We found both the indices of phylogenetic div...
Article
The alpine regions are regarded as one of the most extreme land environments due mainly to of harsh environmental conditions. However, these regions have very distinctive and diverse alpine plants, and the reproductive strategies of these species are an area of concern for many researchers. In this paper, we summarize previous research on reproduct...
Article
Full-text available
Specialized bracts are thought to be important for the successful reproduction of some plants and are regarded as adaptations to diverse driving forces. However, few empirical studies have quantified the adaptive significance of bracts within a cost-benefit framework. We explored the adaptive significance of large and showy bracts for reproduction...
Article
Full-text available
Background: Flower orientation is considered an evolutionary response to pollinators and abiotic factors. Several members of the genus Cremanthodium (Asteraceae) growing in alpine habitats in the Sino–Himalayas have conspicuously nodding capitula, the function of which is not understood.Aims: We investigated the influences of nodding capitula on fl...
Article
Full-text available
Pollination-induced floral changes, which have been widely documented in flowering plants, have been assumed to enhance the plant's reproductive success. However, our understanding of the causes and consequences of these changes is still limited. Using an alpine gynodioecious species, Cyananthus delavayi, we investigated the factors affecting flora...
Article
Question: Does the facilitative effect of cushion plants increase with elevation as a result of increases in environmental harshness? Does this hypothesis apply in the Sino-Himalayan Mountains? Location: Lakaka Pass on the Baima Snow Mountains (28°20′N, 99°05′E), SW China. Methods: We evaluated the spatial association of several plant species with...

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Projects

Project (1)
Project
1. How do alpine plants survive and reproduce in extreme environments; 2. Geographic variation patterns of plant-herbivory insect relationship, especially along altitude.