Mutual pollen grain; C. Microspore at meiosis; D. Microspore at tetrad stage; E. Abortive pollen. Msp: Microspore; T: Tapetum; Td: Tetrad. Then, with transmission electron microscopy (TEM), during meiosis stage, concentrated chromosomes were in the center of microspore, adjacent to the ...
Pollen tube length longer than pollen grain diameter is determined as normal germination. Aniline blue staining of pollen tubes One female flower was pollinated with two male flowers. Pollinated excised pistils (with superior ovaries) were placed in Petri dishes and wetly cultured in a growth ...
aSchematic diagram of four different types of AS.bFour randomly selected genes: Pav_SC0000030.1_G920.1, Pav_SC0000030.1_G1320.1, Pav_SC0000554.1_G090.1 and Pav_SC0000349.1_G280.1 were amplified by RT-PCR, and images of an agarose gels containing the products are provided on the left. A s...
contains the mitochondrial chimeric geneorf182that is associated with non-pollen type sporophytic male sterility in the CMS-D1 line DPA [10]. However, when DPA was used to produce hybrid rice, low stigma exposure and outcross rates were observed, leading to reduced grain yield. To address...
The mature pollen grain of maize (Zea mays) consists of three cells: two small sperm cells and a larger vegetative cell. After the pollen grain arrives at the compatible stigmatic hairs of maize silk, it hydrates. The pollen tube then starts to elongate in the sty...
(Additional file1). The decreased pollen viability under drought stress is in accordance with several literature reports also demonstrating a reduced viability and pollen grain production [54–57]. Interestingly, this drought effect could be partially mitigated by elevated CO2with a slight increase ...
Microcharcoal fragments bigger than 10 μm were counted to reflect fire events (Tinner & Hu 2003). The pollen diagram was constructed using the program TGView©Version 2.1 (Grimm 1994). Percentage calculations of pollen taxa and types are based on the terrestrial pollen sum. Additionally, the...
2), or environmental, such as pollen grain desiccation. Despite these considerations, we maintain confidence in identifying large pollen grains as unreduced (2n) for several reasons. Firstly, the parental clones producing large pollen grains also exhibit an elevated proportion of dyads (Figure S5)....
How may these two transporters be involved in pollen grain Mg2+ homeostasis? It is interesting to note that AtMGT5 was localized to mitochondria. As Mg2+ is a critical cofactor of ATP synthases and other enzymes in the respiration processes, Mg2+ level should serve as an essential regulatory ...
(Additional file1). The decreased pollen viability under drought stress is in accordance with several literature reports also demonstrating a reduced viability and pollen grain production [54–57]. Interestingly, this drought effect could be partially mitigated by elevated CO2with a slight increase ...