scholarly journals Pollen and anther development malfunction in distylous flowers of Palicourea padifolia (Rubiaceae)

2020 ◽  
Vol 98 (4) ◽  
pp. 554-569
Author(s):  
Juan Francisco Ornelas ◽  
Judith Márquez-Guzmán ◽  
Mónica Pérez Pacheco
Keyword(s):  
Cell Death ◽  
Programmed Cell Death ◽  
Pollen Development ◽  
Developmental Stages ◽  
Initial Step ◽  
Anther Development ◽  
Sexual Selection Theory ◽  
Allocation Patterns ◽  
Functional Dioecy ◽  
Study Species

Background: Heterostyly is a genetic polymorphism in which flowers differ between individual plants of a species in heights at which stamens and style are reciprocally positioned. In these species, sexual selection theory predicts that different allocation patterns affect the functioning of polymorphism, enabling the evolutionary transition between heterostyly and dioecy. Questions: Because heterostyly can transit into dioecy, does anther/pollen development differ between floral morphs (LS and SS) of P. padifolia? Is pollen/anther development malfunction associated with one morph more than the other? Study species: Palicourea padifolia (Rubiaceae), a distylous plant. Methods: Tiny floral buds to flowers at anthesis were collected, processed for microphotography, and examined to describe pollen developmental pathways in LS and SS flowers. In addition, we used the TUNEL test to detect programmed cell death. Results: Stages of normal pollen development are fully described and illustrated in LS and SS flowers. Abnormalities due to tapetal degeneration were observed at various developmental stages; at later stages, SS flowers showed more abnormalities than LS flowers. The TUNEL test showed that degeneration was by programmed cell death. Conclusions: Along with previous results of asymmetrical fecundity and pollen transfer of morphs in P. padifolia, our study of pollen development indicates that the SS morph was more prone to lose the male function, though male sterility is far from being complete, which it might be an initial step towards functional dioecy.

scholarly journals The Cysteine Protease CEP1, a Key Executor Involved in Tapetal Programmed Cell Death, Regulates Pollen Development in Arabidopsis

2014 ◽  
Vol 26 (7) ◽  
pp. 2939-2961 ◽  
Author(s):  
Dandan Zhang ◽  
Di Liu ◽  
Xiaomeng Lv ◽  
Ying Wang ◽  
Zhili Xun ◽  
...  
Keyword(s):  
Cell Death ◽  
Programmed Cell Death ◽  
Cysteine Protease ◽  
Pollen Development

scholarly journals Impact of Autophagy on Gene Expression and Tapetal Programmed Cell Death During Pollen Development in Rice

2020 ◽  
Vol 11 ◽  
Author(s):  
Shigeru Hanamata ◽  
Jumpei Sawada ◽  
Seijiro Ono ◽  
Kazunori Ogawa ◽  
Togo Fukunaga ◽  
...  
Keyword(s):  
Gene Expression ◽  
Cell Death ◽  
Programmed Cell Death ◽  
Pollen Development

scholarly journals Functional Dioecy inEchinocereus: Ontogenetic Patterns, Programmed Cell Death, and Evolutionary Significance

2018 ◽  
Vol 179 (4) ◽  
pp. 257-274 ◽  
Author(s):  
Rocío Hernández-Cruz ◽  
Fátima Barrón-Pacheco ◽  
Daniel Sánchez ◽  
Salvador Arias ◽  
Sonia Vázquez-Santana
Keyword(s):  
Cell Death ◽  
Programmed Cell Death ◽  
Evolutionary Significance ◽  
Functional Dioecy

scholarly journals Developmental Coordination of Gamete Differentiation with Programmed Cell Death in Sporulating Yeast

2015 ◽  
Vol 14 (9) ◽  
pp. 858-867 ◽  
Author(s):  
Michael D. Eastwood ◽  
Marc D. Meneghini
Keyword(s):  
Cell Death ◽  
Programmed Cell Death ◽  
Mother Cell ◽  
Developmental Stages ◽  
Parental Cell ◽  
Alternative Form ◽  
Content Type ◽  
Bona Fide ◽  
Mother Cells ◽  
Degree Of Differentiation

ABSTRACT The gametogenesis program of the budding yeast Saccharomyces cerevisiae , also known as sporulation, employs unusual internal meiotic divisions, after which all four meiotic products differentiate within the parental cell. We showed previously that sporulation is typically accompanied by the destruction of discarded immature meiotic products through their exposure to proteases released from the mother cell vacuole, which undergoes an apparent programmed rupture. Here we demonstrate that vacuolar rupture contributes to de facto programmed cell death (PCD) of the meiotic mother cell itself. Meiotic mother cell PCD is accompanied by an accumulation of depolarized mitochondria, organelle swelling, altered plasma membrane characteristics, and cytoplasmic clearance. To ensure that the gametes survive the destructive consequences of developing within a cell that is executing PCD, we hypothesized that PCD is restrained from occurring until spores have attained a threshold degree of differentiation. Consistent with this hypothesis, gene deletions that perturb all but the most terminal postmeiotic spore developmental stages are associated with altered PCD. In these mutants, meiotic mother cells exhibit a delay in vacuolar rupture and then appear to undergo an alternative form of PCD associated with catastrophic consequences for the underdeveloped spores. Our findings reveal yeast sporulation as a context of bona fide PCD that is developmentally coordinated with gamete differentiation.

scholarly journals The MYB80 Transcription Factor Is Required for Pollen Development and the Regulation of Tapetal Programmed Cell Death in Arabidopsis thaliana

2011 ◽  
Vol 23 (6) ◽  
pp. 2209-2224 ◽  
Author(s):  
Huy Anh Phan ◽  
Sylvana Iacuone ◽  
Song F. Li ◽  
Roger W. Parish
Keyword(s):  
Arabidopsis Thaliana ◽  
Cell Death ◽  
Transcription Factor ◽  
Programmed Cell Death ◽  
Pollen Development

Identification of SMS1, a UGPase protein gene that regulates programmed cell death, cell wall formation and pollen development in rice

2021 ◽  
Author(s):  
Shenghai Ye ◽  
Jiyun Liu ◽  
Weibing Yang ◽  
Rongrong Zhai ◽  
Jing Ye ◽  
...  
Keyword(s):  
Cell Death ◽  
Cell Wall ◽  
Programmed Cell Death ◽  
Pollen Development ◽  
Protein Gene ◽  
Cell Wall Formation ◽  
Wall Formation

scholarly journals MONENSIN SENSITIVITY1 (MON1)/CALCIUM CAFFEINE ZINC SENSITIVITY1 (CCZ1)-Mediated Rab7 Activation Regulates Tapetal Programmed Cell Death and Pollen Development

2016 ◽  
Vol 173 (1) ◽  
pp. 206-218 ◽  
Author(s):  
Yong Cui ◽  
Qiong Zhao ◽  
Hong-Tao Xie ◽  
Wing Shing Wong ◽  
Xiangfeng Wang ◽  
...  
Keyword(s):  
Cell Death ◽  
Programmed Cell Death ◽  
Pollen Development
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