Screening Native Woody Species of Taiwan for Indoor Ornamental Usage by Using Growth and Physiological Performances
| Autor: | Yang, Man-Ni, 楊曼旎 |
|---|---|
| Rok vydání: | 2015 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 103 There are 588 trees and 420 shrubs native to Taiwan. Yet only a few of them have been selected for the usage of indoor ornamental purpose. The aim of this study is to select suitable native woody plants for indoor usage based on their growth and physiological performances. Nineteen shade-tolerant native woody species and 4 shade-intolerant species which served as control were tested in this study. Tested plants were placed in indoor, outdoor-low-light, and outdoor-medium-light experimental sites. Indoor environment was maintained at a room temperature of 26℃ with light intensity around 7~9 µmol photon m-2 s-1. Three months after the treatment, we calculated three indexes, including leaf growth index, survival and mortality index, and photosynthesis index, for each species. A final quantitative score was calculated by integrating the above three indexes. Results showed that, 15 out of the 19 tested species did not have any dead seedlings, but seedlings of Ardisia chinensis were all dead. Seedlings of Hernandia nymphiifolia, Liodendron formosanum, and Nageia nagi had higher rate in newly formed leaves and lower rate in defoliate leaves, so that they had higher value for this index. Seedlings of Garcinia subelliptiva did not grow any new leaves and shed any old leaves. Seedlings of Acmena acuminatissima, Ardisia villosa, and Lithocarpus glabra, grew less new leaves and shed more old leaves, so they had a negative value for this index. As for the 4 control shade-intolerant species, only Broussonetia papyrifera showed positive, while the other 3 species were all negative for this index. After 3-month treatment, there were 13 tested species showed positive net photosynthetic rates (0.07 ~ 0.28 µmol m-2 s-1), while Acm. acuminatissima, Antidesma pentandrum, Ard. villosa, Illicium arborescens, and Lit. glabra showed negative photosynthetic rates (-0.05 ~ -0.18 µmol m-2 s-1). Summarized from the growth and physiological performances of each species, we found that Barringtonia asiatica, Diospyros eriantha, Dio. ferrea, Dio. Philippensis, Drypetes littoralis, Euonymus tashiroi, G. subelliptiva, H. nymphiifolia, Lio. formosanum, Murraya paniculata, N. nagi, and Podocarpus macrophyllus var. maki all had potential to be indoor ornamental plants since their final quantitative scores were all positive. On the other hand, Acm. acuminatissima, Ard. chinensis, Ant. Pentandrum, Ard. villosa, Cinnamomum kotoense, I. arborescens, and Lit. glabra had severely defoliated in indoor environment, and their net photosynthetic rates were mostly negative. Their final quantitative scores were all negative, so these species were not suitable as indoor ornamental plants. Among the 12 species with positive final quantitative scores, 11 of them (except E. tashiroi) also showed positive scores under outdoor-low-light environment, a consistent result with that of indoor environment. Thus, we suggest that an outdoor-low-light experimental site can be considered for screening indoor ornamental plants if experimental space is a concern. Among the 12 potential candidates for indoor ornamental plants, 7 species, including Dio. ferrea, Dry. littoralis, G. subelliptiva, H. nymphiifolia, Lio. formosanum, N. nagi, and P. macrophyllus var. maki, were the most recommended native species, because they had little pest infestation and diseases during the experiment, and showed excellent appearances in leaf forms and tree shape. Keywords: leaf growth index, indoor ornamental plants, native woody species of Taiwan, net photosynthetic rates, shade tolerance. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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