Chromosome number, meiotic behavior, and pollen viability were analyzed in 15 species of two genera, Vriesea and Aechmea, native to Rio Grande do Sul, Brazil. This study is the first cytogenetic analysis of these taxa. The chromosome numbers are all n = 25, consistent with the proposed base number of x = 25 for Bromeliaceae. All examined taxa displayed regular bivalent pairing and chromosome segregation at meiosis. Observed meiotic abnormalities include univalents in metaphase I; missing or extra chromosomes and precocious division of centromeres in metaphase II; laggards in telophase I and anaphase II/telophase II. The high pollen viability (>88%) reflects a regular meiosis.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.3732/ajb.91.6.804 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The regulatory module BnamiR827-BnaA09.NLA1-BnaPHT1s modulates phosphate homeostasis, pollen viability and seed yield in Brassica napus.
J Exp Bot
December 2024
National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China.
Phosphorus (P) is an essential macronutrient for the growth and yield of crops. However, there is limited understanding of the regulatory mechanisms of phosphate (Pi) homeostasis, and its impact on growth, development, and yield-related traits in Brassica napus. Here, we identified four NITROGEN LIMITATION ADAPATATION1 (BnaNLA1) genes in B.
View Article and Find Full Text PDFAbnormal transition from meiosis I to meiosis II induces male sterility in a seedless artificial hybrid of citrus.
Mol Breed
January 2025
National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, 430070 Hubei Province China.
Unlabelled: Male sterility is an important trait for breeding and for the seedless fruit production in citrus. We identified one seedling which exhibiting male sterility and seedlessness (named hereafter), from a cross between two fertile parents, with sour orange () as seed parent and Ponkan mandarin () as pollen parent. Analysis using pollen viability staining, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) revealed that the mature pollen of the was aborted, displaying collapse and deformity.
View Article and Find Full Text PDFThe role of sucrose in maintaining pollen viability and germinability in Corylus avellana L.: a possible strategy to cope with climate variability.
Protoplasma
December 2024
BIOGEST-SITEIA, Università Di Modena e Reggio Emilia, Via Amendola 2, 42124, Reggio Emilia, Italy.
In this work, we propose a possible correlation between carbohydrate content in hazelnut pollen (wild type) and viability/germinability, also in a perspective of adaptation to climate variability. Samples from four different cultivation fields in Italy showed values of pollen viability characterized by high levels, ranging between 77.3 and 98.
View Article and Find Full Text PDFEffects of heavy metals and metalloids on plant-animal interaction and biodiversity of terrestrial ecosystems-an overview.
Environ Monit Assess
December 2024
CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla County, Menglun, 666316, Yunnan Province, P.R. China.
Article Synopsis
- Heavy metals and metalloids are widespread in the environment, primarily due to human activities like industrial emissions and mining, posing significant risks to public health and ecosystems.
- Their negative impact on interspecies interactions, particularly between plants and pollinators, results in compromised nectar quality and pollen viability, which can hinder plant reproduction and pollinator health.
- Evidence shows that heavy metal exposure, like cadmium and zinc, adversely affects pollinator performance, growth, and survival, ultimately disrupting plant-pollinator dynamics essential for ecological balance.
Do more food choices lead to bad decisions? A case study in predaceous ladybird beetle, .
Bull Entomol Res
December 2024
Ladybird Research Laboratory, Department of Zoology, University of Lucknow, Uttar Pradesh, Lucknow 226007, India.
Understanding why animals choose one food over another is one of the key questions underlying the fields of behaviour ecology. This study aims to test if ladybird beetle, Mulsant (Coleoptera: Coccinellidae) can forage selectively for nutrients in order to redress specific nutritional imbalances to maximise their fitness. We hypothesised that the presence of more food choices leads to bad decisions in terms of their food selection which ultimately negatively affects the mating and reproductive parameters of .
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!