Results 41 to 50 of about 72,116 (261)

RNA-seq analysis of synchronized developing pollen isolated from a single anther

Frontiers in Plant Science, 2023
Pollen development, from unicellular microspores to anthesis, is a complex process involving the coordinated specification, differentiation and functions of different cell types. Key to understanding this development is identifying the genes expressed at
Liam Le Lievre, Liam Le Lievre, Sreejith P. Chakkatu, Shiny Varghese, Robert C. Day, Sarah M. Pilkington, Lynette Brownfield   +6 more
doaj   +1 more source

Tightly Controlled Expression of bHLH142 Is Essential for Timely Tapetal Programmed Cell Death and Pollen Development in Rice

Frontiers in Plant Science, 2017
Male sterility is important for hybrid seed production. Pollen development is regulated by a complex network. We previously showed that knockout of bHLH142 in rice (Oryza sativa) causes pollen sterility by interrupting tapetal programmed cell death (PCD)
Swee-Suak Ko, Swee-Suak Ko, Min-Jeng Li, Min-Jeng Li, Yi-Jyun Lin, Hong-Xian Hsing, Hong-Xian Hsing, Ting-Ting Yang, Ting-Ting Yang, Tien-Kuan Chen, Chung-Min Jhong, Maurice Sun-Ben Ku, Maurice Sun-Ben Ku   +12 more
doaj   +1 more source

Functional Disruption of the Tomato Putative Ortholog of HAWAIIAN SKIRT Results in Facultative Parthenocarpy, Reduced Fertility and Leaf Morphological Defects

Frontiers in Plant Science, 2019
A number of plant microRNAs have been demonstrated to regulate developmental processes by integrating internal and environmental cues. Recently, the Arabidopsis thaliana F-box protein HAWAIIAN SKIRT (HWS) gene has been described for its role in miRNA ...
Farida Damayanti, Fabien Lombardo, Jun-ichiro Masuda, Jun-ichiro Masuda, Yoshihito Shinozaki, Yoshihito Shinozaki, Takuji Ichino, Takuji Ichino, Ken Hoshikawa, Ken Hoshikawa, Yoshihiro Okabe, Yoshihiro Okabe, Ning Wang, Ning Wang, Naoya Fukuda, Naoya Fukuda, Tohru Ariizumi, Tohru Ariizumi, Hiroshi Ezura, Hiroshi Ezura   +19 more
doaj   +1 more source

Pollen development of Rondeletia odorata (Rubiaceae) [PDF]

American Journal of Botany, 2001
Pollen wall ontogeny of Rondeletia odorata was studied with transmission electron microscopy (TEM) and scanning electron microscopy (SEM) from tetrad stage until maturity. The ontogenetic sequence of wall development in Rondeletia follows, to some extent, the basic scheme in the angiosperms, i.e., development starts centripetally with the pro ...
El-Ghazaly, G., Huysmans, Suzy, Smets, Eric   +2 more
openaire   +2 more sources

Flexible Pressure Sensor With Co‐Optimized Sensitivity and Linearity Based on Gradient Toroidal Microstructures

Advanced Materials Technologies, EarlyView.
A flexible piezoresistive pressure sensor with gradient toroidal CNT/PDMS microstructures is reported. The hierarchical geometry enables sequential electrode contact, achieving a sensitivity of 256.20 kPa−1 and linear response (R2 = 0.99) over 0–1000 kPa.
Rongmei Wang, Ruolin Liu, Ming Lei, Yifan Liu, Fengming Hu, Bing Ji, Chao Peng, Jianyi Luo, Bingpu Zhou   +8 more
wiley   +1 more source

The Development of the Pollen of Sarracenia [PDF]

Botanical Gazette, 1908
(WITH PLATE V) During March I907, through the courtesy of Dr. J. M. MACFARLANE, I had the opportunity of gathering material for this study from the fine collection of sarracenias in the greenhouses of the University of Pennsylvania. The species examined were S. fiava, S. purpurea, S. variolaris, S. rubra, and S. psittacina, besides the hybrids S. /lava
openaire   +1 more source

Cross‐Scale Hierarchical Targeted Delivery System Based on Small‐Scale Magnetic Robots

Advanced Robotics Research, EarlyView.
This article reviews a cross‐scale hierarchical targeted delivery system that integrates magnetic continuum robots and magnetic microrobots. By combining rapid long‐range navigation with precise microscale targeting, the system overcomes key limitations of single‐scale approaches.
Junjian Zhou, Zhiqiang Chen, Yuanbiao Ma, Zhiqiang Tang, Qianqian Wang   +4 more
wiley   +1 more source

FORMATION OF POLLEN IN THE ANTHER OF LILIUM I. DEVELOPMENT OF THE POLLEN WALL

Acta Botanica Neerlandica, 1980
SUMMARY The ultrastructural changes during the microsporogenesis and gametogenesis in Lilium are studied in relation to the surrounding tissues. In this article the development of the microspore and pollen wall is presented. In relation to the increase in pollen volume the nexine is increased but this process is discontinuous.
Willemse, M.T.M., Reznickova, S.A.
openaire   +2 more sources

Autonomous Navigation of Pollen‐Inspired Magnetic Microrobots for Biomedical Applications

Advanced Robotics Research, EarlyView.
A sunflower pollen‐inspired magnetic microrobot enables controlled rolling navigation in vessel‐like environments. Its open geometry reduces hydrodynamic drag, while vision‐based closed‐loop control, shortest‐path planning, and reinforcement learning support target‐reaching and maze navigation with microrobot‐scale accuracy, highlighting a route toward
Ali Anil Demircali, Abdurrahim Yilmaz, Meysam Keshavarz, Jinshi Zhao, Ara Darzi, Eric Yeatman, Burak Temelkuran   +6 more
wiley   +1 more source

Mitochondrial Dynamics for Pollen Development

Plant Physiology, 2019
Mitochondria are active organelles that move rapidly, change shape, and undergo repeated fusion and fission ([Frederick and Shaw, 2007][1]; [Tilokani et al., 2018][2]). Since mitochondria have many important roles, including respiratory energy production through the tricarboxylic acid cycle ...
openaire   +3 more sources