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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 盧炯敏 | zh_TW |
| dc.contributor.advisor | Hyungmin Rho | en |
| dc.contributor.author | 洪靖媛 | zh_TW |
| dc.contributor.author | Ching-Yuan Hung | en |
| dc.date.accessioned | 2024-03-21T16:41:56Z | - |
| dc.date.available | 2024-03-22 | - |
| dc.date.copyright | 2024-03-21 | - |
| dc.date.issued | 2024 | - |
| dc.date.submitted | 2024-01-19 | - |
| dc.identifier.citation | AFA. 2023. Annual report. Taiwan Agriculture and Food Administration. Taiwan.
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/92340 | - |
| dc.description.abstract | 根據政府間氣候變化專門委員會(Intergovernmental Panel on Climate Change, IPCC)的調查報告，全球地表溫度至2100年預計上升2到5°C，而溫度的上升將影響萵苣的生產。萵苣為全球重要的經濟作物，使用以下兩種方法評估是否能於未來較高溫度的環境下維持萵苣生產：根部溫度(root zone temperature, RZT)降低與施用由宜蘭三星蔥分離出的植物生長促進細菌 (plant growth-promoting bacteria, PGPB) ― 枯草桿菌(Bacillus subtilis GFB04).
在前三個試驗中，根溫隨環境變動(RZT-A)與根溫維持低溫(RZT-CO)兩種根溫處理，和高空氣溫度(H-Tair 35/30°C)與低空氣溫度(L-Tair 30/25 或25/20 °C)兩種氣溫處理。在第四個試驗中，根溫和接種枯草桿菌與否則為兩個主要因子。結果顯示，RZT-CO比RZT-A顯著增加了萵苣的地上部鮮重47%至53%，同時地上部的相對含水量(RWC)增加，而根部鮮重降低乾重卻升高，係因根部RWC於RZT-CO組顯著降低，這可能與根部活力有關。在試驗中，葉片的生理表現沒有呈現一致的趨勢，然葉片溫度與環境溫度差(Tdif) 隨萵苣生長而整體降低，可能與萵苣整體對於環境的適應力提升相關。接種枯草桿菌在高溫下減少植物的鮮重和氣孔導度，同時顯著增加丙二醛(malondialdehyde, MDA)的含量，顯示接種之後的萵苣相比於未接種的萵苣，於高溫下面臨更強的逆境。或許此菌株與本奶油萵苣品種於水耕環境下並不相容，未來若想於水耕環境中施用PGPB可能需要尋找其他菌株方可有其他發現。 | zh_TW |
| dc.description.abstract | According to IPCC (Intergovernmental Panel on Climate Change), the global surface temperature is expected to increase by 2°C to 5°C by 2100, which could impact the production of lettuce, an important vegetable worldwide. Two approaches were evaluated to maintain or increase lettuce production under heat stress: cooling the root zone temperature (RZT) and applying Bacillus subtilis GFB04, one of the plant growth-promoting bacteria (PGPB) isolated from Welsh onion.
Ambient RZT (RZT-A) compared to RZT cooling (RZT-CO), and high air temperature (H-Tair, 35/30°C) compared to low air temperature (L-Tair, 30/25 or 25/20) were the main two factors in the first three experiments (Expts.). In Expt. 4, RZT and inoculation (LB compared to Inoc.) were investigated. The results indicated that RZT-CO significantly increased lettuce shoot fresh weight (FW) by 47% to 53% under H-Tair. The relative water content (RWC) of the shoot increased under RZT-CO, but root RWC was reduced under RZT-CO, which might relate to the root vigor. The leaf physiological performance did not exhibit a consistent trend in the Expts. The B. subtilis strain did not appear compatible with butterhead lettuce in a hydroponic system, as it decreased plant FW and gs and increased the malondialdehyde contents under H-Tair. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2024-03-21T16:41:56Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2024-03-21T16:41:56Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | TABLE OF CONTENTS
致謝 i 摘要 ii Abstract iii TABLE OF CONTENTS iv LIST OF FIGURES vii LIST OF TABLES x Chapter 1 Introduction 1 1.1 Research Background and Literature Review 1 1.1.1 Heat Stress Effect Plant Performance 1 1.1.2 Root Zone Temperature Affects Crops’ Growth Performance 2 1.1.3 Plant Growth-promoting Bacteria 4 1.1.4 Brief Introduction of Lettuce 7 1.1.5 Hydroponic System 9 1.1.6 Hydroponic Lettuce in Taiwan 11 1.2 Aim of the Study 13 1.3 Hypothesis 13 Chapter 2 The effects of root zone temperature on lettuce in the hydroponic system 16 2.1 Materials and Methods 16 2.1.1 Experiment Design 16 2.1.2 Seedling Nursing 17 2.1.3 Environmental Settings in Phytotron 18 2.1.4 Hydroponic System Settings 18 2.1.5 Leaf Physiology Measurement 20 2.1.6 Harvest Quality 24 2.1.7 Data Analysis 28 2.2 Results 28 2.2.1 Expt. 1- Preliminary Test of RZT Effects on Lettuce Growth and Physiology 28 2.2.2 Expt. 2- Investigation of Effects of RZT-CO on Lettuce Growth and Physiology 30 2.2.3 Expt. 3- Validation of Effects of RZT-CO on Lettuce Growth and Physiology 31 2.3 Discussion 33 2.3.1 Biomass Change 33 2.3.2 Stem Elongation 33 2.3.3 Relative Water Content and R/S Ratio 34 2.3.4 Leaf Physiological Changes Over the Growth Period 35 2.3.5 Diurnal Pattern of Leaf Physiology 36 2.3.4 Stress Indicators 36 Chapter 3 Investigation of PGPB on lettuce in hydroponic system under heat stress 66 3.1 Materials and Methods 66 3.1.1 Experiment Design 66 3.1.2. Bacteria Inoculation 66 3.1.3 Seedling Nursing 67 3.1.4 Environment Settings in Phytotron 67 3.1.5 Hydroponic System Settings 68 3.1.6 Leaf Physiology Measurement 68 3.1.7 Harvest Quality 68 3.1.8 Data Analysis 68 3.2 Results 68 3.2.1 Biomass and Growth Parameters Changes 68 3.2.2 Leaf Physiology Change Over the Growth Period 69 3.2.3 Diurnal Pattern of Leaf Physiology 70 3.2.4 Stress Indicators 70 3.3 Discussion 70 Chapter 4. Overall Conclusions 84 References 86 Supplementary 92 | - |
| dc.language.iso | en | - |
| dc.subject | 水耕 | zh_TW |
| dc.subject | 氣孔導度 | zh_TW |
| dc.subject | 枯草桿菌 | zh_TW |
| dc.subject | 植物生長促進細菌 | zh_TW |
| dc.subject | 丙二醛 | zh_TW |
| dc.subject | hydroponic | en |
| dc.subject | malondialdehyde | en |
| dc.subject | stomatal conductance | en |
| dc.subject | Bacillus subtilis | en |
| dc.subject | PGPB | en |
| dc.title | 根溫降低與植物生長促進細菌在熱逆境下對萵苣生長的影響 | zh_TW |
| dc.title | The Effects of Root Zone Cooling and Plant Growth-promoting Bacteria on Lettuce (Lactuca sativa) Growth under Heat Stress | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 112-1 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 楊雯如;林淑怡;陳葦玲 | zh_TW |
| dc.contributor.oralexamcommittee | Wen-Ju Yang;Shu-I Lin;Wei-Ling Chen | en |
| dc.subject.keyword | 水耕,植物生長促進細菌,枯草桿菌,氣孔導度,丙二醛, | zh_TW |
| dc.subject.keyword | hydroponic,PGPB,Bacillus subtilis,stomatal conductance,malondialdehyde, | en |
| dc.relation.page | 98 | - |
| dc.identifier.doi | 10.6342/NTU202400116 | - |
| dc.rights.note | 同意授權(限校園內公開) | - |
| dc.date.accepted | 2024-01-22 | - |
| dc.contributor.author-college | 生物資源暨農學院 | - |
| dc.contributor.author-dept | 園藝暨景觀學系 | - |
| dc.date.embargo-lift | 2029-01-16 | - |
| 顯示於系所單位： | 園藝暨景觀學系 | |
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