Diel changes in the CO2 exchange rates of reproductive organs of the tropical tree Durio zibethinus

Abstract

The daily variations in the in situ CO(2) 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 mumol 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 CO(2) refixation reduced the daily respiratory loss by 17, 5, 0.3, and 24% at the flower bud, flower initiation, mixed, and fruit stages, respectively.

Possible Negative Effect of General Flowering on Tree Growth and Aboveground Biomass Increment in a Bornean Tropical Rain Forest

“…The fruits of some evergreen tree species have photosynthetic activity, although their contribution is generally low (Ogawa et al . , Imai & Ogawa ). Dipterocarp fruit wings have low photosynthetic ability (Kenzo et al .…”

“…Ichie et al (2005a) also found that the carbon requirement during the fruit maturation stage is quite high in a dipterocarp tree. The fruits of some evergreen tree species have photosynthetic activity, although their contribution is generally low (Ogawa et al 2005, Imai & Ogawa 2009). Dipterocarp fruit wings have low photosynthetic ability (Kenzo et al 2003).…”

Climate-induced abortion and predation: reproductive success of the pioneer shrubDillenia suffruticosain Malaysian Borneo

“…Temperature and PAR positively affected the reproductive organs at stage one and seed status (Figure 2c, d, 4c, d). The respiration rates of both reproductive organs and whole plants generally increase with high temperature, and increased plant growth is evident at optimal temperatures (Flanagan & Johnson 2005, Ogawa et al 2005. Increased PAR tends to increase fruit set and seed weight in mature fruits (Figueroa-Castro & Valverde 2011, Zhang et al 2005.…”

Quantitative analysis of carbon balance in the reproductive organs and leaves of Cinnamomum camphora (L.) Presl

“…Other reports suggest that reproductive organs such as fruits have photosynthetic activity and are able to re-fix CO 2 in woody plants growing in boreal (Linder and Troeng 1981;Koppel et al 1987), temperate (Bazzaz et al 1979;Ogawa et al 1988;Pavel and DeJong 1993;Proietti et al 1999;Ogawa and Takano 1997;Wang et al 2006), and tropical (Cipollini and Levey 1991;Whiley et al 1992;Ogawa et al 1996;Kenzo et al 2003;Ogawa et al 2005) regions. It is therefore important to consider CO 2 re-fixation by fruit photosynthesis when discussing the carbon balance.…”