Cost of Reproduction in a Spring Ephemeral Species, Adonis ramosa (Ranunculaceae): Carbon Budget for Seed Production

Horibata, Satoshi; Hasegawa, Shigeaki F.; Kudo, Gaku

doi:10.1093/aob/mcm131

Cited by 24 publications

(24 citation statements)

References 33 publications

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“…Resource dynamics during the growing season has been documented in several herbaceous species (Lapointe 1998;Garcia and Ehrlen 2002;Horibata et al 2007;Ida and Kudo 2008;Kudo and Ida 2010;Kleijn et al 2005). Species with a brief photosynthetic period and/or low resource availability often depend on storage for reproduction (Wardlaw 1990).…”

Section: Introductionmentioning

confidence: 99%

How do sink and source activities influence the reproduction and vegetative growth of spring ephemeral herbs under different light conditions?

Sunmonu

Kudo

2014

J Plant Res

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Spring ephemeral herbs inhabiting deciduous forests commonly complete reproduction and vegetative growth before canopy closure in early summer. Effects of shading by early canopy closure on reproductive output and vegetative growth, however, may vary depending on the seasonal allocation patterns of photosynthetic products between current reproduction and storage for future growth in each species. To clarify the effects of sink-source balance on seed production and bulb growth in a spring ephemeral herb, Gagea lutea, we performed a bract removal treatment (source reduction) and a floral-bud removal treatment (sink reduction) under canopy and open conditions. Leaf carbon fixations did not differ between the forest and open sites and among treatments. Bract carbon fixations were also similar between sites but tended to decrease when floral buds were removed. Seed production was higher under open condition but decreased by the bract-removal treatment under both light conditions. In contrast, bulb growth was independent of light conditions and the bract-removal treatment but increased greatly by the bud-removal treatment. Therefore, leaves and bracts acted as specialized source organs for vegetative and reproductive functions, respectively, but photosynthetic products by bracts were flexibly used for bulb growth when plants failed to set fruits. Extension of bright period was advantageous for seed production (i.e., source limited) but not for vegetative growth (i.e., sink limited) in this species.

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Section: Introductionmentioning

confidence: 99%

How do sink and source activities influence the reproduction and vegetative growth of spring ephemeral herbs under different light conditions?

Sunmonu

Kudo

2014

J Plant Res

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“…The results of the early snowmelt year revealed that carbon resource for seed production of G. lutea was probably provided by photosynthesis of bracts, stem, and fruits. Horibata et al (2007) indicated that direct photosynthesis by fruits contributed to reproductive effort. Current seed production and storage for future growth are supported by carbon resources from different parts of a plant.…”

Section: Discussionmentioning

confidence: 99%

Significance of intra-inflorescence variation on flowering time of a spring ephemeral, Gagea lutea (Liliaceae), under seasonal fluctuations of pollinator and light availabilities

Nishikawa

2008

Plant Ecol

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I studied the relationship between seedset patterns within inflorescences and temporal variations in light and pollinator availabilities for 2 years in the spring ephemeral species Gagea lutea in a deciduous forest. Timing of canopy closure and seasonal trend of pollinator frequency did not synchronize with the annual fluctuation in flowering phenology. In the early snowmelt year, seed-set success reflected the seasonal pollinator abundance from early to middle flowering periods. In the late snowmelt year, however, seed-set rates were independent of pollinator activity and decreased with canopy closing even after hand pollination. The restricted seed production by defoliation and the increase in seed-set rates at the forest edge suggested that seed production was supported by current photosynthetic carbon gain. Thus, annual fluctuations of reproductive success can explain the variation in flowering phenology within a population although seasonal light deterioration would serve as a selective force for flowering in the early season.

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“…Other researches also reported the photosynthetic characteristics of spring ephemerals living on the floor of deciduous forest, such as high photosynthetic capacity, higher light-saturated rates, high light compensation points, high respiration rates and high quantum yield of photosynthesis (Sawada et al 2002;Taylor and Pearcy 1975;Goryshina 1972;Kawano et al 1982;Koizumi and Oshima 1985;Yoshie 1986;Yoshie and Yoshida 1987), and other specific traits, e.g. simultaneous shoot growth and sexual reproduction before canopy closure (Horibata et al 2007). These properties can enhance their ability to extend the period of carbon gain and plant life to the drought periods or canopy closure at the end of their growing season (Sawada et al 2002;Ehleringer 1983).…”

Section: Introductionmentioning

confidence: 98%

Photosynthetic characteristics of spring ephemerals in the desert ecosystem of Dzungaria Basin, northwest China

SuFen

Tang

2009

Environ Earth Sci

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Spring ephemerals have the highest photosynthetic rates in higher plants. Gas exchanges and related environmental factors of four typical spring ephemerals, Eremopyrum orientale, Malcolmia scorpioides, Tetracme quadricormis and Arnebia decumbens were measured in their natural environments in the Gurbantunggut Desert of the Dzungaria Basin, northwestern China. Diurnal variations in net photosynthetic rate (P N ), transpiration rate (E), stomatal conductance (gs), and water use efficiency (WUE) were analyzed at individual leaf level for these species. P N of E. orientale and M. scorpioides showed a bimodal diurnal pattern, whereas that of T. quadricormis and A. decumbens showed a unimodal pattern, with the maximum value occurred at noon (around 12:00). E of all four species showed a unimodal pattern. Higher WUE in the morning was related to higher P N and lower E. The maximum value of gs appeared in early morning, and then decreased gradually during the daytime. The highest photosynthetically active radiation (PAR) occurred at 14:00, but there was a 2 h lag between the highest temperatures of air and leaf and the highest PAR. The maximum net photosynthetic rate (P N max) of the four spring ephemerals were 18.44, 32.03, 33.17, and 20.04 lmolCO 2 m -2 s -1 , respectively. The present study revealed that the midday depression of photosynthesis of E. orientale and M. scorpioides was mainly due to nonstomatal limitation, whereas that of T. quadricormis and A. decumbens was mainly due to stomatal limitation during 14:00-16:00 followed by non-stomatal limitation after 16:00. Our results illustrated that the change of E was consistent with the diurnal fluctuation of air temperature, but the diurnal change of P N was affected by the whole microclimate, i.e. temperature, relative humidity (RH), PAR, etc.

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Cost of Reproduction in a Spring Ephemeral Species, Adonis ramosa (Ranunculaceae): Carbon Budget for Seed Production

Cited by 24 publications

References 33 publications

How do sink and source activities influence the reproduction and vegetative growth of spring ephemeral herbs under different light conditions?

How do sink and source activities influence the reproduction and vegetative growth of spring ephemeral herbs under different light conditions?

Significance of intra-inflorescence variation on flowering time of a spring ephemeral, Gagea lutea (Liliaceae), under seasonal fluctuations of pollinator and light availabilities

Photosynthetic characteristics of spring ephemerals in the desert ecosystem of Dzungaria Basin, northwest China

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