Abstract: An object is to find out a safe component that can effectively exhibit action including the protection of a brain function, the prevention or alleviation of a reduction in cognitive ability, and the prevention or alleviation of dementia. A component of a plant body of a hybrid between Camellia sinensis and Camellia taliensis is contained as an active component. The hybrid between Camellia sinensis and Camellia taliensis is preferably Sunrouge. A tea leaf extract of the plant body of the hybrid between Camellia sinensis and Camellia taliensis is preferably contained.

Abstract: An object of the present invention is to find a component that is safe and is capable of effectively exerting various effects such as prevention or amelioration of diabetes, prevention or amelioration of metabolic syndrome, amelioration of insulin resistance, inhibition of an increase in a postprandial blood sugar level, and inhibition of ?-glucosidase activity. The present invention provides agents for preventing or ameliorating diabetes or the like, the agents including a component of a hybrid plant of Camellia sinensis and Camellia taliensis as an active ingredient. The hybrid plant is preferably Sun Rouge, and each of the agents preferably includes a tea leaf extract of the hybrid plant.

Abstract: A shoot of a plant is cultivated under the presence of glutathione, so that the shoot is rooted. It is possible to cultivate the shoot under the presence of glutathione by use of a rooting medium including glutathione or by contacting a solution including glutathione with the shoot. Oxidized glutathione is preferably used as glutathione. By promoting rooting of the shoot of the plant, a rooting rate of the shoot of the plant is improved. This improves productivity of a clone seedling.

Abstract: A shoot of a plant is cultivated under the presence of glutathione, so that the shoot is rooted. It is possible to cultivate the shoot under the presence of glutathione by use of a rooting medium including glutathione or by contacting a solution including glutathione with the shoot. Oxidized glutathione is preferably used as glutathione. By promoting rooting of the shoot of the plant, a rooting rate of the shoot of the plant is improved. This improves productivity of a clone seedling.

Abstract: A shoot of a plant is cultivated under the presence of glutathione, so that the shoot is rooted. It is possible to cultivate the shoot under the presence of glutathione by use of a rooting medium including glutathione or by contacting a solution including glutathione with the shoot. Oxidized glutathione is preferably used as glutathione. By promoting rooting of the shoot of the plant, a rooting rate of the shoot of the plant is improved. This improves productivity of a clone seedling.

Abstract: Provided are a plant cultivation container, a plant cultivation method, and a method of producing a rooted cutting, in which a plant can be cultivated under a desired humidity condition, whereby a rooting rate can be enhanced and extension of a root can be promoted. In the plant cultivation container in which a plant cultivating medium (2) is provided in an inside of a container body (1) with a substantially hermetically sealed structure, a partition wall (3) that partitions the inside of the container body (1) into two upper portion and lower portion and supports the medium (2) is provided in the container body (1). The upper portion of the container body (1) defined by partitioning of the partition wall (3) constitutes a high-humidity chamber (4), and the lower portion of the container body (1) constitutes a low-humidity chamber (5). A bent hole (7) that allows the medium (2) and the low-humidity chamber (4) to communicate with each other is provided in the partition wall (3).

Abstract: Gene introduction to a plant is carried out by using a vector which comprises the following constitutional units A and B: A: a DNA sequence comprising P1, an expression inhibitory sequence and a desired gene which is controlled by P1 and the expression inhibitory sequence; B: a DNA sequence comprising P2, an expression inhibitory gene which is controlled by P2, P3, the expression inhibitory sequence, and a gene of a removal reaction-catalyzing enzyme which is controlled by P3 and the expression inhibitory sequence, wherein the DNA sequence is removed by expression of the gene of a removal reaction-catalyzing enzyme, wherein P1 is a promoter which shows its activity in at least a callus and a plant tissue where a desired gene should be expressed, P2 is a promoter which shows its activity in at least a callus, and P3 is a promoter which shows its activity in at least a plant tissue where P1 and P2 do not show their activities.

Abstract: An isolated and purified DNA having a nucleotide sequence which comprises SEQ ID NO: 1; an isolated and purified DNA which hybridizes to a DNA having a nucleotide sequence which comprises SEQ ID NO: 1 under stringent conditions, and encodes a transcription factor controlling a phenylpropanoid biosynthesis pathway; a recombinant vector comprising the DNA; the recombinant vector, further comprising a promoter to which the DNA is operably fused; the recombinant vector, wherein the DNA is operably fused to the promoter in the sense or antisense direction; a plant cell into which the DNA has been introduced; a plant regenerated from the plant cell; an isolated and purified protein encoded by the DNA; and an isolated and purified DNA which encodes a protein having the amino acid sequence of SEQ ID NO: 2.

Abstract: The present invention relates to an isolated and purified DNA having a nucleotide sequence which comprises SEQ ID NO:1, and encodes a transcription factor controlling a phenylpropanoid biosynthesis pathway; a recombinant vector comprising the DNA; the recombinant vector, further comprising a promoter to which the DNA is operably fused; the recombinant vector, wherein the DNA is operably fused to the promoter in the sense or antisense direction; a plant cell into which the DNA has been introduced; a plant regenerated from the plant cell; and an isolated and purified DNA which encodes a protein having the amino acid sequence of SEQ ID NO:2.

Abstract: A feed composition for fish breeding with an improved preference for fish comprises from 0.03 to 1% by weight of each of 5'-guanylic acid, 5'-cytidylic acid, 5'-uridylic acid and 5'-adenylic acid or 5'-inosinic acid, all of which are hydrolyzates of ribonucleic acid, or a yeast extract containing a large amount of the foregoing 5'-nucleotides and oligopeptide.