Results 81 to 90 of about 21,065 (290)

Signalling pathways in pollen germination and tube growth [PDF]

Protoplasma, 2006
Signalling is an integral component in the establishment and maintenance of cellular identity. In plants, tip-growing cells represent an ideal system to investigate signal transduction mechanisms, and among these, pollen tubes (PTs) are one of the favourite models. Many signalling pathways have been identified during germination and tip growth, namely,
Malhó, R., Liu, Q., Monteiro, D., Rato, C., Camacho, L., Dinis, A.   +5 more
openaire   +3 more sources

The Microtubular Cytoskeleton during Pollen Development and Pollen Tube Growth in Nicotiana tabacum

, 1992
The role of the male partner in the fertilization process in higher plants has been defined from long time (Stanley and Linskens, 1972). As shown by optical and ultrastructural investigations, some closely related steps such as pollen development, pollen
Antonio Tiezzi, Giampiero Cai, Joseph Bednara, Bednara, Joseph, CAI, GIAMPIERO, Cecilia Del Casino, Tiezzi, Antonio, MOSCATELLI, ALESSANDRA, Alessandra Moscatelli, Bartalesi, Alessandro, DEL CASINO, CECILIA, Alessandro Bartalesi   +11 more
core   +1 more source

A new, ~4500‐year varve record and high‐resolution tephrochronology from lake Hämälänlampi, eastern Finland, provides age constraints for the Furnas C and the Glen Garry/Askja A‐2000 eruptions

Journal of Quaternary Science, EarlyView.
ABSTRACT The northern European distal cryptotephra framework is constantly developing both in terms of identification of new tephra horizons and improved age constraints for the already well‐established tephra marker horizons. However, many prehistoric tephra layers have only been dated by the radiocarbon method, with its inherent problems.
Maarit Kalliokoski, Veera Erola, Saija Saarni   +2 more
wiley   +1 more source

VANGUARD1: At the Forefront of Pollen Tube Growth

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
openaire   +2 more sources

Marine Isotope Stage 4 glaciation in northern England, UK: Evidence from Victoria Cave, North Yorkshire

Journal of Quaternary Science, EarlyView.
ABSTRACT Victoria Cave, north Yorkshire, England, contains a long sequence of Pleistocene clastic sediments and calcite flowstones. Earlier work, using U–Th dating, established that the flowstone units formed in interglacial stages corresponding to Marine Isotope Stages (MIS) 13, 11, 9, 7 and 5.
Tom C. Lord, Peter Wilson, Joyce Lundberg, Adrian P. Palmer, Matt W. Telfer, Rhiannon E. Stevens, Phillip J. Murphy, Mark Lewis   +7 more
wiley   +1 more source

Vacuolar trafficking in pollen tube growth and guidance [PDF]

Plant Signaling & Behavior, 2018
Vacuoles are versatile organelles in plant cells, critical for growth and responses to environmental cues. Vacuoles are dynamic tubular structures in pollen tubes, the male gametophytes. Mutations at vacuolar fusion machinery caused male gametophytic lethality by affecting pollen tube growth and guidance, which are critical steps leading to angiosperm ...
Xin, Liang, Qiang-Nan, Feng, Sha, Li, Yan, Zhang   +3 more
openaire   +2 more sources

Pollen Viability and Pollen Tube Growth of IPB’s Papaya

, 2016
The purpose of the research was to examine the pollen germination process and growth rate of pollen tubes of papaya. Pollen tube growth of nine genotypes of papaya (IPB 1, IPB 2, IPB 3, IPB 4, IPB 5, IPB 7, IPB 8, IPB 9, and IPB 10) was investigated in ...
Tuharea, Cenra Intan Hartuti, Widodo, Winarso Dradjad, Poerwanto, Roedhy, Suketi, Ketty   +3 more
core   +1 more source

Understanding pollen tube growth dynamics using the Unscented Kalman Filter [PDF]

, 2016
In the process of pollination, a pollen tube grows from a pollen grain that has fallen on the stigma of a flower. This tube grows towards the ovary of the flower where it will deliver male reproductive material.
Zhenbiao Yang, Ninad Thakoor, Thakoor, Ninad, Nolan Ung, Tambo, Asongu L, Nan Luo, Bir Bhanu, Ung, Nolan, Luo, Nan, Bhanu, Bir, Asongu L. Tambo, Yang, Zhenbiao   +11 more
core   +1 more source

Integrated characterization of Greek fennel genotypes through morpho‐agronomical characteristics, yield components and phytochemical compounds

JSFA reports, Volume 5, Issue 3, Page 91-103, March 2025.
Abstract Background Fennel (Foeniculum vulgare Mill.) is a widely cultivated vegetable and aromatic‐medicinal plant. In this research, field studies assessed 12 fennel genotypes of diverse origin, comprising 10 Greek accessions and two European commercial varieties, focusing on their morpho‐agronomical traits, phenolic compounds and antioxidant ...
Kalliopi I. Kadoglidou, Christos Maliachovas, Parthenopi Ralli, Maria Irakli, Nektaria Tsivelika, Athanasios G. Mavromatis, Paschalina Chatzopoulou   +6 more
wiley   +1 more source

Phyllocephalum keralense (Asteraceae) a new species from southern Western Ghats of Kerala, India

Nordic Journal of Botany, EarlyView.
A new species of Phyllocephalum is described and illustrated from Palakkad district of Kerala, India. The new species shows similarity to P. rangacharii but differs with respect to key floral traits, viz. ovoid shape of the capitula, involucral bracts in 3 series, inflated receptacle and ovoid 6‐ribbed ovary with 5–6 densely barbellate pappus setae ...
Arya Sindhu, Sojan Jose, Alex Philip Alen, Venugopalan Nair Saradamma Anilkumar, Veerankutty Suresh   +4 more
wiley   +1 more source