Diel changes in the CO2 exchange rates of reproductive organs of the tropical tree Durio zibethinus
The daily variations in the in situ CO2 exchange of the reproductive organs of Durio zibethinus trees, growing in an experimental field at University Putra Malaysia (UPM), were examined at different growth stages. Reproductive organs emerged on the leafless portions of branches inside the crown. The...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
The Botanical Society of Japan and Springer-Verlag Tokyo
2005
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/35106/1/Diel%20changes%20in%20the%20CO2%20exchange%20rates%20of%20reproductive%20organs%20of%20the%20tropical%20tree%20Durio%20zibethinus.pdf |
| _version_ | 1796972640482623488 |
|---|---|
| author | Ogawa, Kazuharu Abdullah, Ahmad Makmom Awang, Muhamad Furukawa, Akio |
| author_facet | Ogawa, Kazuharu Abdullah, Ahmad Makmom Awang, Muhamad Furukawa, Akio |
| author_sort | Ogawa, Kazuharu |
| collection | UPM |
| description | The daily variations in the in situ CO2 exchange of the reproductive organs of Durio zibethinus trees, growing in an experimental field at University Putra Malaysia (UPM), were examined at different growth stages. Reproductive organs emerged on the leafless portions of branches inside the crown. The photon flux densities (PFD) in the chambers used for the measurements were less than 100 μmol m−2 s−1 and were 40% of the PFD outside of the crown. The daytime net respiration rate and the nighttime dark respiration rate were higher at the time of flower initiation and during the mixed stages, when flower buds, flowers, and fruit coexist, than at the flower bud stage. The net respiration rate was lower than the daytime dark respiration rate at given temperatures, especially at the flower bud and fruit stages. Conversely, the net respiration rate was similar to the daytime dark respiration rate at the mixed stage. Photosynthetic CO2 refixation reduced the daily respiratory loss by 17, 5, 0.3, and 24% at the flower bud, flower initiation, mixed, and fruit stages, respectively. |
| first_indexed | 2024-03-06T08:31:18Z |
| format | Article |
| id | upm.eprints-35106 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T08:31:18Z |
| publishDate | 2005 |
| publisher | The Botanical Society of Japan and Springer-Verlag Tokyo |
| record_format | dspace |
| spelling | upm.eprints-351062016-10-11T02:47:26Z http://psasir.upm.edu.my/id/eprint/35106/ Diel changes in the CO2 exchange rates of reproductive organs of the tropical tree Durio zibethinus Ogawa, Kazuharu Abdullah, Ahmad Makmom Awang, Muhamad Furukawa, Akio The daily variations in the in situ CO2 exchange of the reproductive organs of Durio zibethinus trees, growing in an experimental field at University Putra Malaysia (UPM), were examined at different growth stages. Reproductive organs emerged on the leafless portions of branches inside the crown. The photon flux densities (PFD) in the chambers used for the measurements were less than 100 μmol m−2 s−1 and were 40% of the PFD outside of the crown. The daytime net respiration rate and the nighttime dark respiration rate were higher at the time of flower initiation and during the mixed stages, when flower buds, flowers, and fruit coexist, than at the flower bud stage. The net respiration rate was lower than the daytime dark respiration rate at given temperatures, especially at the flower bud and fruit stages. Conversely, the net respiration rate was similar to the daytime dark respiration rate at the mixed stage. Photosynthetic CO2 refixation reduced the daily respiratory loss by 17, 5, 0.3, and 24% at the flower bud, flower initiation, mixed, and fruit stages, respectively. The Botanical Society of Japan and Springer-Verlag Tokyo 2005 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/35106/1/Diel%20changes%20in%20the%20CO2%20exchange%20rates%20of%20reproductive%20organs%20of%20the%20tropical%20tree%20Durio%20zibethinus.pdf Ogawa, Kazuharu and Abdullah, Ahmad Makmom and Awang, Muhamad and Furukawa, Akio (2005) Diel changes in the CO2 exchange rates of reproductive organs of the tropical tree Durio zibethinus. Journal of Plant Research, 118 (3). pp. 187-192. ISSN 0918-9440; ESSN: 1618-0860 http://link.springer.com/article/10.1007/s10265-005-0207-5?view=classic 10.1007/s10265-005-0207-5 |
| spellingShingle | Ogawa, Kazuharu Abdullah, Ahmad Makmom Awang, Muhamad Furukawa, Akio Diel changes in the CO2 exchange rates of reproductive organs of the tropical tree Durio zibethinus |
| title | Diel changes in the CO2 exchange rates of reproductive organs of the tropical tree Durio zibethinus |
| title_full | Diel changes in the CO2 exchange rates of reproductive organs of the tropical tree Durio zibethinus |
| title_fullStr | Diel changes in the CO2 exchange rates of reproductive organs of the tropical tree Durio zibethinus |
| title_full_unstemmed | Diel changes in the CO2 exchange rates of reproductive organs of the tropical tree Durio zibethinus |
| title_short | Diel changes in the CO2 exchange rates of reproductive organs of the tropical tree Durio zibethinus |
| title_sort | diel changes in the co2 exchange rates of reproductive organs of the tropical tree durio zibethinus |
| url | http://psasir.upm.edu.my/id/eprint/35106/1/Diel%20changes%20in%20the%20CO2%20exchange%20rates%20of%20reproductive%20organs%20of%20the%20tropical%20tree%20Durio%20zibethinus.pdf |
| work_keys_str_mv | AT ogawakazuharu dielchangesintheco2exchangeratesofreproductiveorgansofthetropicaltreeduriozibethinus AT abdullahahmadmakmom dielchangesintheco2exchangeratesofreproductiveorgansofthetropicaltreeduriozibethinus AT awangmuhamad dielchangesintheco2exchangeratesofreproductiveorgansofthetropicaltreeduriozibethinus AT furukawaakio dielchangesintheco2exchangeratesofreproductiveorgansofthetropicaltreeduriozibethinus |