No abstract

A broad source of Gerbera × hybrida Hort. germplasm was evaluated for vase life. Senescence mode, i.e., bending or folding of stems or wilting of ligulae was also recorded for flowers evaluated. Intensive selection was practiced to improve vase life. About 10% of the plants from a sample population were selected for having flowers with high vase life. Progeny means for vase life resulting from a topcross between these plants and `Appleblossom' were used to select five plants (about 1.5% of the sample population) whose flowers had high vase life. A diallel cross using these five plants as parents resulted in a progeny population with an increase in mean vase life of 3.4 days compared to mean vase life for the initial sample population. Increases in vase life means for days to bending, folding, and wilting were 0.3, 3.5, and 1.2 days, respectively. Plants with flowers which senesced due to wilting had the longest mean vase life before and after breeding. Changes in proportion of senescence modes were observed; bending decreased, folding and wilting increased. Frequencies of bending, folding, and wilting were compared to vase life means for 10 progenies. Proportion of bending generally decreased as vase life increased.

The premise is that Heidegger remained a phenomenologist from beginning to end and that phenomenology is exclusively about meaning and its source. The essay presents Heidegger's interpretation of the being (Sein) of things as their meaningful presence (Anwesen) and his tracing of such meaningful presence back to its source in the clearing, which is thrown-open or appropriated ex-sistence (das ereignete/geworfene Da-sein).The essay argues five theses: (1) Being is the meaningful presence of things to man. (2) Such meaningful presence is the Befragtes of Heidegger's question, not the Erfragtes. (3) Being and Time's goal was to articulate the openness that allows for all meaningfulness. (4) Ereignis -the appropriation of exsistence to sustaining the clearing -is the later Heidegger's reinscription of thrown-openness, der geworfene Entwurf. (5) Appropriated thrown-openness, as the clearing, is intrinsically hidden, i.e., unknowable. Some preliminaries:(1) I cite Heidegger's texts by page and line (the line-number follows the period) in both the Gesamtausgabe and the current English translations where available, all of which are listed in the bibliography at the end of this issue of the journal. I cite Sein und Zeit in the Niemeyer 11th edition and in the ET by Macquarrie-Robinson. (2) Sinn and Bedeutung are closely related, although Sinn is broader than Bedeutung. Sinn refers either to intelligibility as such or to the fact of something being intelligible, whereas Bedeutung is the specific meaning that a thing has. Sinn as intelligibility is generally interchangeable with Bedeutsamkeit and Verständlichkeit. Thus I translate Sinn as "intelligibility" or "meaningfulness." Sinn in turn allows for Bedeutung as the particular meaning of a specific thing. (3) I take "intellect" in the broad sense of νοῦς and in the specific sense of λόγος understood as discursive intellect, whether practical or theoretical. (4) Dasein is translated as "existence" (= existentiel), and Existenz or Da-sein as "ex-sistence" (= existential). The word "man" refers to human being, not the male of the species. I render das Seiende as "beings," "things," and "entities" ex aequo. "Man" refers to human beings in general, not to the male of the species.

Intensive selection to improve vase life was performed on a sample population of Gerber ×hybrida Hort. from a broad source of germplasm. Progeny of a 5 × 5 diallel cross yielded estimates of narrow sense heritability (h2 = 0.28) and broad sense heritability (H2 = 0.28) for vase life based on a mean of 1.96 measurements per plant. Additive gene action is postulated to control this character since the difference between total genotypic variance and additive genetic variance components was small. Repeatability (r = 0.57) based on a single measurement per plant was moderately high. Heritability estimates were also determined based on 1, 2, 3, 5, and ∞ measurements per plant. Heritability ranged from 22% to 39%.

Procedures for in vitro establishment, rapid shoot proliferation, and ex vitro plantlet acclimatization of Cryptocoryne lucens de Witt were determined. Shoot cultures were established from surface-sterilized shoot tips cultured on Linsmaier and Skoog salts and vitamins medium (LS) solidified with 0.8% (w/v) agar and supplemented with 2.0 μm BA and 0.5 μm NAA. The effect of BA (0 to 20 μm) and 0.5 μm NAA on shoot multiplication from single-node and clustered triple-node shoot explants was determined after 35 days. The most efficient shoot proliferation (7.7 shoots/explant) occurred from single-node shoot explants cultured on LS + 20 μm BA and 0.5 μm NAA. Maximum plantlet establishment was achieved by direct sticking of triple-node (cluster) microcuttings in either soilless planting medium or polyurethane foam cubes. Production of highly branched salable plants from microcuttings was possible within 18 weeks. Chemical names used: N-(phenylmethyl) -1H-purin-6-amine (BA); 1-naphthaleneacetic acid (NAA).