Cryopreservation of pollen from two ginseng species —Panax ginseng L. and P. quinquefolium L.—was studied. Freezing anthers that served as pollen carriers to –40C before liquid N storage affected pollen viability little after liquid N storage. Anther moisture content affected pollen viability significantly when stored in liquid N. The ideal anther moisture content to carry pollen for liquid N s...

In this research, some independent experiments were carried out for investigating the effects of microspore developmental stage, bud pretreatments (cold, heat and Ca), and embryo induction medium on anther culture of some strawberry cultivars. The results showed that the percentages of responsive and embryogenic anthers in cultivar Paros in liquid medium were influenced not only by different de...

This is the first contribution about histochemistry of vegetative and reproductive aerial organs in genus Piper L. malgassicum accumulates alkaloids terpenes epidermis underlying layers parenchyma, both leaves, stems anthers. Some idioblasts appear to contain a large amount secondary metabolites. The micro-anatomical analysis showed peculiar secretory structures anthers ovary. Several lipid agg...

Among the >200 members of the leucine-rich repeat receptor kinase family in Arabidopsis thaliana, only a few have been functionally characterized. Here, we report a critical function in anther development for the SOMATIC EMBRYOGENESIS RECEPTOR KINASE1 (SERK1) and SERK2 genes. Both SERK1 and SERK2 are expressed widely in locules until stage 6 anthers and are more concentrated in the tapetal cell...

Male sterility is defined as the deviant condition in normally bisexual plants when no viable pollen is formed (Frankel and Galun, 1977). Male sterility has been exploited as an effective tool to aid hybrid seed production in many crops. Using this trait, seed producers can transform one inbred from a planned hybridization into a “female” line, thereby ensuring seed of hybrid origin on the male...

Photoperiod-dependent male fertility is a critical enabler of modern hybrid breeding. A MYB transcription factor, CSA, key regulator sugar partitioning in rice anthers, disruption which causes photoperiod-sensitive sterility. However, little known about the molecular mechanisms governing plant response to photoperiod. Here, we have obtained another sterile mutant, csa2, exhibits semi-sterility ...

IV INHERITED condition of pollen abortion is frequently found in many A species of plants. In maize 20 genes for male sterility are listed by EMERSON, BEADLE and FRASER (193.5). Male sterile-1 reported by SINGLETON and JONES (1930) is on chromosome 6 closely linked with the Y y endosperm locus. All of the gene steriles described are independent recessives, each capable of bringing about either ...

(Current Biology 30, 4425–4431.e1–e3; November 16, 2020) In the originally published paper, Figure 4A caption provided parameter estimates for direct linear relationship between temporal change in UVP and ozone separately taxa with exposed anthers concealed anthers. A slope of 0.15 was reported anthers; however, estimate is −0.15, which correctly text main body. The R2 value p original article ...

Sorghum (Sorghum bicolor L. Moench) is one of the most important grain crops in the world. The nuclear male sterility (NMS) trait, which is caused by mutations on the nuclear gene, is valuable for hybrid breeding and genetic studies. Several NMS mutants have been reported previously, but none of them were well characterized. Here, we present our detailed morphological characterization of a new ...

Plants lack a germ line; consequently, during reproduction adult somatic cells within flowers must switch from mitotic proliferation to meiosis. In maize (Zea mays L.) anthers, hypoxic conditions in the developing tassel trigger pre-meiotic competence in the column of pluripotent progenitor cells in the center of anther lobes, and within 24 hr these newly specified germinal cells have patterned...