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Germination Ecology of Two Indigenous Range Grasses Lasiurus Scindicus and Panicum Turgidum Naeema Sultan Abdullah Al-Shamisi

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Germination Ecology of Two Indigenous Range Grasses Lasiurus Scindicus and Panicum Turgidum Naeema Sultan Abdullah Al-Shamisi United Arab Emirates University Scholarworks@UAEU Theses Electronic Theses and Dissertations 2009 Germination Ecology of Two Indigenous Range Grasses Lasiurus scindicus and Panicum turgidum Naeema Sultan Abdullah Al-Shamisi Follow this and additional works at: https://scholarworks.uaeu.ac.ae/all_theses Part of the Environmental Sciences Commons Recommended Citation Abdullah Al-Shamisi, Naeema Sultan, "Germination Ecology of Two Indigenous Range Grasses Lasiurus scindicus and Panicum turgidum" (2009). Theses. 605. https://scholarworks.uaeu.ac.ae/all_theses/605 This Thesis is brought to you for free and open access by the Electronic Theses and Dissertations at Scholarworks@UAEU. It has been accepted for inclusion in Theses by an authorized administrator of Scholarworks@UAEU. For more information, please contact [email protected]. United Arab Emirates University Deanship of Graduate Studies M.Sc. Program in Environmental Sciences GERMINATION ECOLOGY OF TWO INDIGENOUS RANGE GRASSES LASIURUS SCINDICUS AND PANICUM TURGIDUM By Naeema Sultan Abdullah AI-Shamisi A thesis submitted to United Arab Emirates University In Partial Fulfillment of the Requirements For the Degree of M.Sc. in Environmental Sciences 2009 United Arab Emirates University Deanship of Graduate Studies M.Sc. Program in Environmental Sciences GERMINA TION ECOLOGY OF TWO INDIGENOUS RANGE GRASSES LASlUR US SClNDICUS AND PANICUM TURGIDUM By Naeema Sultan Abdullah Al-Shamisi A thesis Submitted to United Arab Emirates University In Partial Fulfillment of the Requirements For the Degree of M.Sc. in Environmental Sciences Supervisors Fatima Mahmoud AI-Ansari Ali Ali EI-Keblawy Associate Professor Associate Professor Department of Biology Department of Biology College of Science College of Science UAE University UAE University 2009 The Thc, i of aeema ultan Alshamisi for the Degrec of Ma ter or nmental i appro ed. ............................� ...... .........':'7:-:-:"'. J7.1?J........................................... Examining ommittee Member, Dr. Fatima AI-Ansari · ,1· jcy ··· Examining Committee Member, Dr. Shahina Ghazanfar .�(.,.t.�... � .............................................. ... Examining Committee Member, Dr. Taoufik Ksiksi Dr. Ta rek Youssef Prog'-'ram Director, United Arab Emirates Uni ersity 2008/2009 This worb is dedicated to my father & my mother my husband & my children ACKNOWLEDGEMENTS I would like to express my thanks and gratitude to my country and the university I've been studying in the United Arab Emirates University under the leadership of Sheikh Nahayan Bin Mabarak AI-Nahayan. My deep graduated and thanks goes to my thesis supervisors Dr. Fatima AI-Ansari and Dr. Ali AI-Keblawy, Biology Department, for their continuous help and support throughout my study. I would like also to thank Mr. Mohamed Makkawi and Mr. Rashed Ahmed Ali from AI Dhaid research station for providing seeds. Many thanks goes to my colleagues at the Biology Department and my friends Raja AI Meskari, Shaheera Bahwan and Yussra AI Dhaheri for their encouragement and support. Finally, I would like to thank my husband, children, father, mother, brothers, sisters, and every one that encouraged and supported me in my study and my life. Thank you all. TABLE OF CONTENTS Ti t le Page Ta ble of Co ntent •••••••••••••••••• '0 ••••••••••••••••••, •••••••• , •••••••••••••••••, ••••••••••••••••••••••••• ........... ......... ............, .......... of Table . ................. .. .., ............. Li t .. .. ..... iv Li t of Figure ............................................................................................... vii ............... ............... ...... , ............ AB TRACT ....................................... ....... 1 1. I NTRODUCTION ........................................................................................... 4 1.1. Importance of Indigenous Plants .................................................................................. 4 1.2. Effects of Light and Temperature on Germination ..................................................... 7 1.3. Effects of Salinity and drought on Germination .......................................................................... 8 1.4. Recovery Germination from Saline Solution .............................................................................. 11 1.5. Seed Dormancy and Germination Stage ...................................................................................... 12 1.6. Impacts of Dormancy Regulating Chemicals .............................................................................. 13 1.7. Maternal effects on Germination ................................................................................................. 16 1.8. Impact of Seed Storage on Gennination ...................................................................................... 17 1.9. Objectives of the Study ................................................................................................................ 18 2. MATERIAL AND METHODS..................................... ..................................... .. 20 2.1. The Study Area ............................................................................................................................ 20 2.2. Climate of the UAE........ .............................................................................................................. 20 2.3. Climate of the Egypt. ................................................................................................................... 21 2.4. Studied Species ............................................................................................................................ 22 2.4. 1 Lasiurus scindicus .......................................... · .... · ................ · .... · .... · ........................... ...... ... 22 22 2.4.2 Panicum Turgidllm ............................................................................................................. .. 23 2.5. Seed Collections... ................................ ·····.··.............. ...................... .......................................... 24 2.6. Germination Experiment. ............................................................................................................ 24 2.7. Effects of Light, Temperature and Salinity ...................... ............. ...........· ................· . ....... · ........ 25 2.8. Effe cts of Dormancy Regulating Chemicals........... ............. · ........· ........ · ..........· ..· ........ .... · ...... .. 2.9. Effect of Fruit Color and Maternal Habitat on Germination of Lasiurus scindicus.................. 26 2. 10. Effe ct of Seed Storage............................................................................................................... 26 2. 11. Drought e periment............. ......................... .............. ..... ............... ................. ......................... 27 2. 12 . Calculation and Stat i tical Analysis........................................................................................ 27 2. 12.1. Calculation ofger mination rate......................................................................................... 27 2. 12.2. Stati tical analy is................... ................................. ...................... ................... ................ 28 3. RE ULT 30 3.1. Effect of Salinity, Temperature and Light on Final Germination Percentage of P. turgidum .... 30 3. 1. 1 Effects on finalgern 1ination . ......................................................................... 30 3. 1.2 Effects on germination rate........................................................................... 31 3.2. Effect of Salinity, Temperature and Light on Recovery Germination of P. turgidum ...... ... .... 37 3.2. 1 Effect on finalger mination . ........................................ ........... ....................... 37 3.2.2 Effects on germination rate......................................... ................................... 38 3.3. Effect of Salinity, Temperature and Light on Total gennination Percentage of P. turgidum .... 44 3.4. Effects of Salinity, Temperature and Light on Final Germination Percentage of La iurus 48 scindiclis ....................................................................................................... 3.4.1 Effects on finalger mination . ...................................... .................................... 48 3.4.2 Effe cts on germination rate............................................................................ 50 3.5. Effects of Salinity, Temperature and Light on Recovery Germination of L. scindicus.......... .. 56 3.5. 1 Effects on fi nal germination........................................................................... 56 3.5.2 Effects on germination rate....................................... ..................................... 57 3.6. Effects of Salinity, Temperature and Light on Total Germination Percentage of L. scindiclls... 63 3.7. Effects Dormancy Regulating Chemicals of Innate and Salinity-Induced Dormancy of Pa nicutn turgidum ... .. .... .. .... 67 3.7.1. Effe cts on innate dormancy .........................................................··· ..............· 67 3.7.2. Effects on salinity induced dormancy........................................ ....................... 67 3.8. Effects Dormancy Regulating Chemicals on Innate and Salinity-Induced Dormancy of LasiunJs scindicus. ... .. ... ... .. ... .... ... .... .... .... .... 72 3.8.1. Effects on innate dormancy.
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