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Lie Li, Yu-xin Tong, Jun-ling Lu, Yang-mei Li, and Qi-chang Yang

. ‘Tiberius’) grown in a PFAL, four treatments were used by combining the R and B with each monochromatic G, Y, O, and FR and using the combination of R and B as the control in this experiment. Lettuce growth and morphology, anatomical structure

Open access

Nuananong Purente, Bin Chen, Xiaowei Liu, Yunwei Zhou, and Miao He

morphology. ( A, C ) Treatment with CK. ( B, D ) Treatment with ET2-138. Scale bar, 10 cm. Table 2. Effect of ethyl methanesulfonate on leaf morphology and plant height. Table 3. Effect of ethyl methanesulfonate on anatomical structure of leaf. Fig. 2

Open access

Mingyue Bao, Minmin Liu, Qingxia Zhang, Tonglin Wang, Xia Sun, and Jinguang Xu

colors. We documented the anatomic structure of the petals and determined the cell sap pH value, water content, Ct, soluble sugar and soluble protein contents, and pigment content and composition. We also analyzed the indexes influencing flower color

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Ze Li, Kai Shi, Fanhang Zhang, Lin Zhang, Hongxu Long, Yanling Zeng, Zhiming Liu, Genhua Niu, and Xiaofeng Tan

), CO 2 compensation point (CCP) and J max at a standard temperature of 25 °C were calculated with a model of the temperature dependence of the photosynthetic parameters. Leaf anatomic structure. Using optical microscopy and paraffin section technology

Open access

Melike Cirak and James R. Myers

others are isogenic at the pc locus, with those labeled “green” having the genotype pp pcpc and those labeled “white” as being pp PcPc . ‘Spartacus’ is pp pcpc and ‘Ulysses’ is pp PcPc . Seed testa anatomic structure. A micrograph

Free access

Umit Serdar, Bulent Kose, and Fatma Yilmaz

We studied the anatomical structure of graft unions in European chestnut using several grafting methods. The work was done in the greenhouse during 2003–04. The grafting methods epicotyl, hypocotyl, and inverted radicle were used. The grafts were made with scions of clone SA 5-1 on clone SE 21-9 rootstock. The samples for examination were taken from the graft unions 2, 6, and 12 months after grafting, and fixed in a formalin–acetic acid–alcohol solution. The observation of the anatomical structure of the graft union area revealed that new cambium, xylem, and phloem tissues were formed in the samples two months after grafting. Further, it could be also observed that 6 months were necessary for continuous cambial connection.

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Michele R. Warmund, Rusty Fuller, and John H. Dunn

1 Associate professor. 2 Graduate student. 3 Professor. Missouri Agricultural Experiment Station journal series no. 12,683. We gratefully acknowledge Ray Evert for identifying anatomical structures on zoysiagrass mersitems. The cost of publishing

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Young A. Kim and Jong Suk Lee

To investigate the differences of anatomical structure of neck tissue between bent-neck and strong-neck flowers, scanning electron microscopy of neck tissue during senescence of cut rose flowers held in deionized water or preservative solution (3% sucrose + 200 ppm HQS + 0.1 mM ethionine) was observed. Lignins in xylem, phloem, and interfascicular cambium of neck were stained to red by phloroglucine. More lignin was formed in the phloem of neck in rose flowers held in preservative solution than deionized water. Neck strength of cut rose could be increased by increase of lignin content, and this would prevent bent-neck and extend vase life. Parenchyma cells in neck part of rose flowers held in deionized water had thinner cell wall and less starch grains at senescence than those of flowers held in preservative solution at day 7. These starch grains would be used as energy source of rose flowers and extend vase life. Globular crystals were observed in the inner part of cells and had shape of large thorny. These crystals were cumulated in cell walls, then would prevent the activity of cell wall decomposition or increase cell wall permeability.

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Norberto Maciel and Eybar Rojas

The shoot apex from plants of Heliconia bihai (L.) L. and H. latispatha Benth. growing under natural inductive conditions, and two shade-loving (60% and 0%) at different growth stages (one to six or eight expanded leaves) was studied. Observations were made using a light microscope, in 15-μm-thick sections. The analysis included changes in 1) size and shape of the meristem, 2) shape, ubication of new leaves, spathes, and flowers in the apex, and 3) relation between these characteristics, the condition of the apex (vegetative, transitional, and generative), and the plant growth stages. The anatomical structures of the shoot apex (meristem, leaves, and flowers primordias) are illustrated by photomicrographs. The meristem change in size and shape with grow up expanded leaf number. The condition of the apex was related to the total leaf number. The total leaf number was five or six in H. bihai under 60% and 0 % shade levels and 8 in H. latispatha at both shade levels. The apex reaches the generative stage when the plant has a minimum expanded leaf number of four (at 60 % shade) and five (0 %) in H. bihai and five in both shade conditions in H. latispatha. After this, the inflorescence started progressively to raise above the rest of rhizome.

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Hongwen Huang, J.D. Norton, G.E. Boyhan, and B.R. Abrahams

Graft compatibility was investigated for 15 Chinese chestnut (Castanea mollissima Bl.) cultivars, nine American chestnut [C. dentata (Marsh.) Borkh.] selections, six Japanese chestnut (C. crenata Sieb.) cultivars, and two putative Japanese hybrids on two known rootstocks of Chinese chestnut. Intraspecific grafting of Chinese chestnut resulted in 80% success after two growing seasons. An unusual anatomical structure of the chestnut stem had a significant effect on graft success. The phloem fiber bundles related to graft failure are described in the study. Interspecific grafts of seven American and five Japanese chestnut selections resulted in ≥70% success. The putative Japanese hybrids had a significantly lower success rate (<50%) regardless of rootstocks. A marked graft incompatibility was found in one Japanese/Chinese and two American/Chinese combinations. Graft incompatibility related to morphological abnormalities at the graft union was also observed in interspecific grafts. Comparisons of cambial isoperoxidase isozymes between successful and unsuccessful grafts did not support the hypothesis that peroxidase isozymes are indicators of rootstock-scion compatibility. The results suggest that genetic incompatibility is not a major cause of graft failure in Chinese chestnut.