Article
Plant Sciences
Hans Jacquemyn, Rein Brys, Michael Waud, Alexandra Evans, Tomas Figura, Marc-Andre Selosse
Summary: Partial mycoheterotrophy, the ability of plants to obtain carbon from fungi in addition to photosynthesis, is more common in the Plant Kingdom than anticipated. Isotope analyses show wide variation in isotopic signatures among mycoheterotrophic plants, with differences in mycorrhizal communities but unclear relation to isotopic differences. Different orchid species formed mycorrhizas with a diverse range of fungi, but variation in mycorrhizal community composition did not correspond to isotope signatures differences.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Plant Sciences
Yuan-Yuan Li, Margaux Boeraeve, Yu-Hsiu Cho, Hans Jacquemyn, Yung- Lee
Summary: Mycorrhizal associations play a crucial role in orchid germination and seedling establishment, potentially impacting the distribution and abundance of orchids in natural conditions. The mycoheterotrophic orchid Gastrodia confusoides displays random aboveground spatial patterns of distribution within bamboo forests, possibly due to the scattered distribution of litter-decaying fungi. Our study provides evidence that the abundance of litter-decaying fungi varies randomly within the bamboo forest and independently from G. confusoides adults.
FRONTIERS IN PLANT SCIENCE
(2022)
Review
Biochemistry & Molecular Biology
Wei Wang, Hanxian Xiong, Kaiting Sun, Bo Zhang, Meng-Xiang Sun
Summary: This study reviews the communication among the endosperm, embryo, and seed coat during seed development and highlights recent advances in this field.
JOURNAL OF INTEGRATIVE PLANT BIOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Zahra Mahdavi, Shirin Dianati Daylami, Ali Fadavi, Kourosh Vahdati
Summary: Artificial seed production is an important technology that can preserve elite plant germplasm. This study found that using optimal concentrations of sodium alginates and calcium chloride can produce high-quality artificial seeds, while storing synthetic seeds at appropriate temperature and duration can maintain their good germination performance.
PLANT CELL TISSUE AND ORGAN CULTURE
(2023)
Article
Plant Sciences
S. Diantina, C. McGill, J. Millner, J. Nadarajan, H. W. Pritchard, L. Colville, A. Clavijo McCormick
Summary: The changes in seed lipid composition during ageing can lead to loss of seed viability in many plant species. In this study, it was found that all orchid species examined experienced significant viability loss after ageing, along with a decrease in fatty acid content. Further research is needed to understand the relationship between fatty acid degradation and seed viability loss in orchids.
Article
Plant Sciences
Mariana Ferreira Alves, Fabio Pinheiro, Carlos Eduardo Pereira Nunes, Francisco Prosdocimi, Deise Schroder Sarzi, Carolina Furtado, Juliana Lischka Sampaio Mayer
Summary: The study investigated the presence of endophytic and epiphytic fungi in different stages of the reproductive process of Pogoniopsis schenckii. It was found that endophytic fungi were mainly present in floral stems and indehiscent fruit, potentially affecting fruit ripening. The orchid was also found to be autogamous, providing an explanation for the low genetic diversity and high genetic structure in populations.
Review
Plant Sciences
Yung-I. Lee, Edward C. Yeung
Summary: This review provides a developmental and functional perspective on the integuments and seed coat of orchid seeds. The seed coat is primarily formed by the outer integument, while the inner integument may remain undeveloped or contribute to the embryo's protection through the synthesis and accumulation of nutrients. The outermost layer of the seed coat, called the testa, is lignified, while the subepidermal layer(s), known as tegmen, have thin walls.
Article
Plant Sciences
Yingying Wen, Ying Qin, Bingyi Shao, Jianwu Li, Chongbo Ma, Yan Liu, Boyun Yang, Xiaohua Jin
Summary: The plastomes of Gastrodieae, a mycoheterotrophic clade of the Orchidaceae family, are characterized by reduced structure and gene content, low GC content, rrn block formation, lineage-specific reconfiguration, and positive selection. They serve as an excellent model for studying plastome evolution and provide insights into plastome evolution in parasitic plants.
Article
Plant Sciences
Elise Bizouerne, Julia Buitink, Benoit Ly Vu, Joseph Ly Vu, Eddi Esteban, Asher Pasha, Nicholas Provart, Jerome Verdier, Olivier Leprince
Summary: By analyzing the RNA sequences of different seed tissues, several gene modules associated with the physiological traits of seeds were identified. Dormancy is gradually released during fruit ripening, accompanied by an increase in seed vigor. Some gene modules involve gene expression regulation related to seed vigor.
Article
Agriculture, Multidisciplinary
ZHU Mei-chen, Hu Ran, Zhao Hui-Yan, Tang Yun-Shan, Shi Xiang-Tian, Jiang Hai-Yan, Zhang Zhi-Yuan, Fu Fu-You, Xu Xin-Fu, Tang Zhang-Lin, Liu Lie-Zhao, Lu Kun, Li Jia-Na, Qu Cun-Min
Summary: In this study, a population of rapeseed recombinant inbred lines was used to map candidate genes controlling seed pigments, revealing 94 quantitative trait loci (QTLs) for seed pigments distributed across 15 of the 19 rapeseed chromosomes. Consensus regions on chromosomes A06, A09 and C08 were associated with multiple seed pigment traits. Through RNA-seq and qRT-PCR analysis, 12 candidate genes potentially involved in pigment accumulation were identified.
JOURNAL OF INTEGRATIVE AGRICULTURE
(2021)
Article
Plant Sciences
Kenji Suetsugu, Kenji Fukushima, Takashi Makino, Shuka Ikematsu, Tomoaki Sakamoto, Seisuke Kimura
Summary: The study analyzed the floral transcriptomes of two completely cleistogamous Gastrodia species and their chasmogamous sister species. The results showed common modifications in the expression of developmental regulators, indicating convergent expression changes in MADS-box genes. Pseudotime analysis revealed a prolonged juvenile state and eventual maturation, suggesting partial neoteny as a potential mechanism for the rapid evolution of cleistogamous flowers in Gastrodia.
Review
Plant Sciences
Teagen D. Quilichini, Peng Gao, Bianyun Yu, Dengjin Bing, Raju Datla, Pierre Fobert, Daoquan Xiang
Summary: This review focuses on the role of seed coat in pea crop, its contribution to seed composition and nutritional value. It describes the important features of seed coat development in legumes and discusses the genetic and molecular regulation mechanisms as well as efforts to improve seed coat traits.
Article
Plant Sciences
Lisi Zhou, Tongyao Chen, Xiandan Qiu, Jinxin Liu, Shunxing Guo
Summary: This study assembled and annotated the plastome of the mycoheterotrophic orchid Galeola lindleyana, and compared it with other Vanilleae orchids, revealing evolutionary variations between photoautotrophic and mycoheterotrophic plastomes. The G. lindleyana plastome was found to have lost most photosynthesis-related genes, except for six genes encoding ATP synthase and psaJ in photosystem I. Compared with photautotrophic plastomes, the mycoheterotrophic orchid's plastome showed contraction in the inverted repeat (IR) regions and the large single copy (LSC) region, and expansion in the small single copy (SSC) region.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Plant Sciences
Nathaniel J. J. Klimpert, Juliana Lischka Sampaio Mayer, Deise Schroder Sarzi, Francisco Prosdocimi, Fabio Pinheiro, Sean W. W. Graham
Summary: The study reveals Pogoniopsis as an independent case of photosynthesis loss in orchids and provides insights into its molecular evolution at the genomic level. Slowly evolving mitochondrial genes help clarify the phylogenetic placement of Pogoniopsis in orchids, contrasting with the rate-elevated plastome data.
AMERICAN JOURNAL OF BOTANY
(2022)
Article
Plant Sciences
Sasikarn Prasongsom, Kanchit Thammasiri, Hugh W. Pritchard
Summary: This study examines the dormancy state of orchid seeds and finds that some orchid seeds can be non-dormant. It also reveals that orchid seeds have different morphological and morphophysiological characteristics compared to other plant species.
SEED SCIENCE RESEARCH
(2022)