Search Results

You are looking at 1 - 10 of 10 items for :

  • Author or Editor: Hsu-Jen Yang x
  • HortScience x
Clear All Modify Search
Author:

Abstract

Asparagus officinalis L. plants infected with either asparagus virus 1 or asparagus virus 2 exhibited mild reduction of vigor and productivity. Plants infected with both viruses showed severe decline and mortality in the second year in the field.

Open Access
Author:

Abstract

Methyl l-(butylcarbamoyl)-2-benzimidazolcarbamate (benomyl), a systemic fungicide, added to modified Murashige and Skoog's medium regulated asparagus shoot and root development. Low levels of benomyl (10 to 50 ppm) promoted multiple vigorous shoot development. Higher levels of benomyl (100 to 250 ppm) caused the development of abnormally short, thick shoots and inhibited root formation. The enlargement of the shoots is due to proliferation of cortex, phloem, and xylem cells.

Open Access
Author:

Abstract

Asparagus officinalis L. is a cross-pollinated dioecious crop. Staminate plants are more productive than pistillate plants (12, 23, 24). If a field of all staminate plants, representing superior selections, could be established, then increased yields would result. Propagation of asparagus by seeds results in almost equal numbers of staminate and pistillate plants and in individual plants of varying yielding ability (4, 5, 8, 11, 12, 23, 24, 39). Propagation by stem cuttings has not been possible (29, 30) and division of individual crowns has not been commericially feasible as only a few genetically identical plants at any one time can be developed. It would be an advantage to propagate genetically identical asparagus plants in large quantities from superior selections. Tissue culture shows promise as a useful method to reach this objective. It has been estimated that 300,000 transplantable asparagus plants may be produced from a single shoot apex culture in a year (9), but it remains to be demonstrated in actual practice. This discussion will summarize the tissue culture methods that have been developed and describe a possible procedure for vegetative mass production of asparagus plants through tissue culture.

Open Access
Authors: and

Abstract

6-Furfuxylamino purine (kinetin) at 0.1% plus indoleacetic acid (IAA) at 0.005 to 0.025% in lanolin, applied directly to the lateral buds at nodes on the basal portion of stems induced aerial crown formation with shoot growth.

Open Access
Authors: and

Abstract

Asparagus plants freed of 3 viruses were obtained by aseptic culture of shoot tips and apical meristems. More plantlets developed from shoot tip cultures than from apicalmeristem cultures, but a much larger proportion of the meristem cultures were virus free. Consequently, the number of virus-free plants obtained by these 2 methods were approximately equal. The ease of excising and culturing shoot tips makes this the preferred method. The aseptic stock plants obtained are being used as the source of propagants for mass production of virus-free asparagus plants.

Open Access
Authors: and

Abstract

More rooted Asparagus officinalis L. plantlets were obtained in vitro from stem segments with 3 or more branch-shoots than from those with 1 or 2 branch-shoots; those without branch-shoots produced the fewest plantlets.

Open Access
Authors: and

Abstract

One-bud segments from moderately vigorous shoots of aseptically grown Asparagus officinalis L. stock plants were cultured on modified Murashige and Skoog’s medium (MMS) containing 0.1 ppm of α-naphthaleneacetic acid (NAA) and 6-furfurylamino purine (kinetin). Only 35% of the cultures developed into rooted plantlets. A high percentage of nonrooted plantlets were induced to root by reculturing on fresh MMS medium containing 0.1 ppm NAA. More plantlets rooted if they were older than 4 weeks when recultured on the fresh medium.

Open Access
Authors: and

Abstract

Survival of Asparagus officinalis L. transplants in soil was significantly improved with a minimum of labor when they were first transplanted into the Jiffy 7 peat pots from aseptic culture and grown under intermittent mist for 5 to 8 days.

Open Access
Authors: and

Abstract

Asparagus is generally propagated by seed and occasionally by crown division. Crowns are usually formed underground at the base of stem (1, 2, 3, 4). To our knowledge, the formation of crowns at above-ground nodes and plant development therefrom has never been reported. Occurrence of such crowns opens the way to a rapid means of vegetative propagation. Here we describe the morphology of aerial crown formation and subsequent development of these crowns into apparently normal plants.

Open Access
Authors: and

Abstract

A modified procedure was developed for vegetatively increasing normal diploid Asparagus officinalis L. This is accomplished by culturing stock plants from unrooted lateral buds from spears, and by rooting buds from basal portions of shoots of stock plants. Murashige and Skoog's inorganic medium with added growth substances was used.

Open Access