Photosynthetic Potentials of in Vitro-grown Juvenile, Adult, and Rejuvenated Sequoia Sempervirens (D. Don) Endl. Shoots

紅杉試管幼年、老齡、及其復幼植莖光合作用之潛力

黃麗春(Li-Chun Huang) ； 翁瑞禧(Jui-Hsi Weng) ； 王秋惠(Chiu-Hui Wang) ； 郭靜儀(Ching-I Kuo) ； 謝昱暲(Yuh-Jang Shieh)

《Botanical Bulletin of Academia Sinica》 44卷1期 (2003/01) Pp. 31-35

https://doi.org/10.7016/BBAS.200301.0031

摘要

紅杉不同生長相(Developmental Phases)即幼年期與老齡期植株建立之試管培養，比較其試管內光合作用之生理特性為本研究之主要探討。以一種幼年苗，二株成齡老樹及該二成齡老株返老還輕復幼後，培養之試管無性系取其植莖為試驗材料，以現二種幼年性即幼年莖與復幼莖與成齡老株植莖，細胞水份含量相同，約為85%。分析生長速率（植莖生長長度及鮮重增加）及含氮量，發現二幼年性皆高于成齡老株。幼年莖與復幼莖其光合作用顯著高于成齡老株，但二生長相，無論幼年期或老齡期之(F(下標 m)-F(下標 0))/F(下標 m)相同，顯示二生長相葉之光合系統的電子傳遞效率并無差異。

關鍵字

紅杉 ； 生長相 ； 光合作用 ； 呼吸作用 ； 含氮量

並列摘要

In vitro shoot tips of Sequoia sempervirens (D. Don.) Endl including a juvenile, two adult, and two rejuvenated adult clones were examined for differences in basic physiological characteristics Moisture contents were the same, around 85%, for all tissues regardless of origin Growth rates, determined by fresh weight increase and shoot elongation, were higher for the juvenile and rejuvenated shoots They correlated with higher total nitrogen contents Juvenile and rejuvenated shoots also showed higher rates of photosynthesis and respiration, evidenced by faster O2 evolution and consumption The photosynthetic rates were associated with more chlorophyll, especially chlorophyll a, in the juvenile and the rejuvenated shoots Nevertheless, identical quantum efficiencies of photosystem II indicated the same photosystems were operating and with equal effectiveness in juvenile, adult, and rejuvenated tissues.

並列關鍵字

Phase change ； Photosynthesis ； Respiration ； Sequoia sempervirens ； Total nitrogen content