Opportunistic emissions of volatile isoprenoids

Owen, Susan M.; Peñuelas, Josep

doi:10.1016/j.tplants.2005.07.010

Cited by 128 publications

(97 citation statements)

References 49 publications

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“…The longer evolution time of Borneo flora seems to have allowed evolutive development of more widespread defensive, allelopatic and infochemical strategies involving terpenes, carbon rich secondary metabolites known to have antiherbivore (Mihaliak et al 1987, Bennet and Wallsgrove 1994, Landau et al 1994, Sorensen et al 2005, Mote et al 2007, infochemical (Llusia and Peñuelas 2001) antistress Llusia 2003, 2004), and alellochemical (Peñuelas et al 1996, Owen andPeñuelas 2005) functions, and to be low cost chemical defences (Mote et al 2007) effective at lower concentrations than other chemical defences (Bryant et al 1983, Coley et al 1985.…”

Section: Discussionmentioning

confidence: 99%

Lower P contents and more widespread terpene presence in old Bornean than in young Hawaiian tropical plant species guilds

et al. 2011

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Abstract. Leaf elemental and secondary metabolite contents and morphological traits are important measures of time-dependent ecosystem changes. We aimed to test whether plants from older tropical forests have lower nutrient contents and different elemental stoichiometry than plants from younger ecosystems (''soil age'' hypothesis) and whether they had different contents of carbon based secondary compounds (CBSC) and morphological traits as a result of a longer evolution under tropical conditions. We conducted a phylogeny-independent study of the foliar chemical and structural traits in two sets of 86 species each measured in two different-aged tropical forests, a young soil forest in Hawaii and an old soil forest in Borneo. The leaf contents of nutrients and micronutrients tended to be higher in Hawaii than in Borneo but leaf N:P content ratio was not different. The ''soil age'' hypothesis was thus only partially supported by the results indicating that several other factors influence plant elemental content. Total phenolic content was twice larger in Hawaiian than in Bornean plant species. Terpene contents were not different in terpene-containing species but the percentage of species containing terpenes was much higher in Borneo (97%) than in Hawaii (34%) suggesting that the longer time of evolution in Borneo has allowed a more widespread development of very diverse defensive, allelopatic and information relationships of plants with specialist herbivores and other plants. Principal component analyses separated Hawaii and Borneo species on the basis of leaf elemental composition, total phenolics and terpene contents and leaf dry mass per area (LMA). The results collectively support the ''leaf economic spectrum'' and ''carbon excess'' paradigms because in both sets of species and also in the combined set of Borneo and Hawaiian species, there are negative relationships of N content with LMA and total phenolics. The results suggest thus that changes throughout time in N and P availability can be important but do not explain all the variability underlying the evolutionary changes in leaf chemistry and structure in these tropical forests. Other factors determining species biogeochemical niche such as K, Mg or S elemental stoichiometry, leaf economic traits and changes in plant defence and communication strategy are also likely to be involved.

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Section: Discussionmentioning

confidence: 99%

Lower P contents and more widespread terpene presence in old Bornean than in young Hawaiian tropical plant species guilds

et al. 2011

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“…Isoprene and monoterpenes are synthesized in processes related to the biosynthesis of carotenoids in the chloroplasts. Their formation is thus regulated at least partly by the same factors (Owen and Penuelas, 2005). The substrates involved in their biosynthesis are derived from the Calvin cycle, and therefore a direct link to photosynthesis has been postulated and formulated in a physiological model framework describing emissions of isoprene (Niinemets et al, 1999) and monoterpenes .…”

Section: Introductionmentioning

confidence: 99%

Day-time concentrations of biogenic volatile organic compounds in a boreal forest canopy and their relation to environmental and biological factors

et al. 2009

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Abstract. Atmospheric concentrations of methanol, acetaldehyde, acetone, isoprene and monoterpenes were measured using PTR-MS (proton transfer reaction mass spectrometry) in a boreal forest site in Hyytiälä, Finland (61 • 51 N, 24 • 17 E). The concentration measurements were made in the upper canopy of a Scots pine forest during 6 June, -31 August, 2007. Meteorological variables such as temperature and photosynthetically active radiation were measured simultaneously. We also detected biologically sensitive turnover points such as the onsets of photosynthetic activity, onset of growing season, bud burst and stem growth during the annual cycle and compared them to changes in BVOC (biogenic volatile organic compound) concentrations. A typical seasonal pattern of winter minimum and summer maximum was found for all studied compounds except acetaldehyde. Spring time methanol and acetone concentrations increased together with photosynthetic capacity. The day-time daily median BVOC concentrations correlated best with air temperature. The intercorrelations between compounds and the analysis of meteorological conditions indicated that the measured concentrations presented well the local source. During an exceptional summer drought period the concentrations were neither connected with photosynthesis nor transpiration, but they were regulated by some other, yet unknown factors.

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“…The PRI is a good estimator of LUE at foliar [10,24], canopy [25] and ecosystem levels [13]. The applicability of PRI in predicting foliar isoprene emissions is based on the inverse relationship between isoprenoid emissions and LUE, due to the higher availability of photosynthetic reducing power for isoprenoid production under lower LUE levels [22], and to the positive relationship between PRI (via changes in the xanthophyll cycle) and isoprene biosynthesis [26].…”

Section: Discussionmentioning

confidence: 99%

“…Foliar photosynthetic activity is reduced when LUE is low and consequently more reducing power for isoprene production is available. Many studies have reported that isoprene emissions are related to carotenoid content [21,22]. The existence of the relationship between isoprene emissions and carotenoids is based on either substrate availability or complementary functionality.…”

Section: Measurements Of Hyperspectral Reflectancementioning

confidence: 99%

Assessing Ecosystem Isoprene Emissions by Hyperspectral Remote Sensing

et al. 2018

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This study examined the relationship between foliar isoprene emissions, light use efficiency and photochemical reflectance index (PRI) throughout the canopy profile and explored the contribution of xanthophyll cycle pigments versus other carotenoid pigments to the isoprene/PRI relationship. Foliar isoprene emissions within the canopy profile were measured in a high-density poplar plantation in Flanders (Belgium) during the 2016 growing season. The results confirmed that PRI was a promising estimator of isoprene emissions at canopy level. Interestingly, xanthophyll cycle pigments contributed more to isoprene biosynthesis than chlorophyll and drove the isoprene/PRI relationship. The simple independent pigment index and novel defined indices, such as the hyperspectral isoprene index and simple hyperspectral isoprene index, showed promising results and could be suitable estimators of isoprene emissions due to their strong relationship with the xanthophyll pool.

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Opportunistic emissions of volatile isoprenoids

Cited by 128 publications

References 49 publications

Lower P contents and more widespread terpene presence in old Bornean than in young Hawaiian tropical plant species guilds

Lower P contents and more widespread terpene presence in old Bornean than in young Hawaiian tropical plant species guilds

Day-time concentrations of biogenic volatile organic compounds in a boreal forest canopy and their relation to environmental and biological factors

Assessing Ecosystem Isoprene Emissions by Hyperspectral Remote Sensing

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