Key Laboratory of Crop Physiology

Jiangxi, China

Key Laboratory of Crop Physiology

Jiangxi, China
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Chen C.,Jiangxi Agricultural University | Xia Q.-W.,Jiangxi Agricultural University | Xiao H.-J.,Jiangxi Agricultural University | Xiao L.,Jiangxi Agricultural University | And 2 more authors.
Journal of Insect Science | Year: 2014

In order to understand the differences of life-history traits between diapause and direct development individuals in the cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), the development time, body size, growth rate, and adult longevity were investigated between the two populations, which were induced under 12:12 L:D and 16:8 L:D photoperiods, respectively, at 20, 22, and 25°C. The results indicated that the larval development time, pupal weight, adult weight, and growth rate were significantly different between diapause and direct developing individuals. The diapause developing individuals had a significantly higher pupal and adult weight and a longer larval time compared with direct developing individuals. However, the growth rate in diapause developing individuals was lower than that in the direct developing individuals. Analysis by GLM showed that larval time, pupal and adult weight, and growth rate were significantly influenced by both temperature and developmental pathway. The pupal and adult weights were greater in males than females in both developmental pathways, exhibiting sexual size dimorphism. The dimorphism in adult weight was more pronounced than in pupal weight because female pupae lost more weight at metamorphosis compared to male pupae. Protogyny was observed in both developmental pathways. However, the protogyny phenomenon was more pronounced at lower temperatures in direct developing individuals, whereas it was more pronounced in diapause developing individuals when they experienced higher temperatures in their larval stage and partial pupal period. The adult longevity of diapause developing individuals was significantly longer than that of direct developing individuals. The results reveal that the lifehistory strategy was different between diapause and direct developing individuals. © 2014 Journal of Insect Science.


Chen C.,Key Laboratory of Physiology | Chen C.,Key Laboratory of Crop Physiology | Chen C.,Jiangxi Agricultural University | Xia Q.-W.,Key Laboratory of Physiology | And 11 more authors.
Bulletin of Entomological Research | Year: 2014

The intensity of pupal diapause in the cotton bollworm, Helicoverpa armigera (Hübner) was investigated under both laboratory and natural conditions. By transferring diapausing pupae induced under LD 11:13, LD 12:12 and LD 13:11 at 20, 22 and 25°C to 25°C combined with LD 15:9 to terminate diapause the rearing day length of 11h evoked greater intensity of diapause than did 12 and 13h at 25°C; whereas the rearing temperature of 25°C evoked more intense diapause than did 20 and 22°C under LD 11:13. By transferring diapausing pupae induced under LD 12:12 at 20 and 22°C to six temperatures of 18, 20, 22, 25, 28 and 31°C combined with LD 15:9 to terminate diapause, the duration of diapause was significantly shortened from 146 days at 18°C to 24 days at 31°C, showing that high temperatures significantly accelerate diapause development. Furthermore, the duration of diapause was significantly longer at the rearing temperature of 22°C than that at 20°C when the diapause-terminating temperatures were 20 and 22°C. Chilling at 5°C did not shorten the duration of diapause but lengthened it when chilling period was included. However, chilling plays an important role in synchronizing adult emergence. Rearing temperature of 22°C also evoked more intense diapause than did 20°C in most chilling treatments. When the overwintering pupae were transferred at different times from natural temperatures to 25°C, it was found that the earlier the transfer took place, the earlier the adults emerged when the time spent under natural conditions was included. However, cool temperatures before March showed an enhanced effect on diapause development at 20°C, suggesting that the high diapause-terminating temperature can offset the effect of chilling on diapause development. The result of diapause termination under natural conditions suggests that the developmental threshold for post-diapause development in H. armigera should be around 17.5°C. © 2013 Cambridge University Press.


Liu X.-P.,Jiangxi Agricultural University | Liu X.-P.,Key Laboratory of Crop Physiology | He H.-M.,Jiangxi Agricultural University | He H.-M.,Key Laboratory of Crop Physiology | And 4 more authors.
Insect Science | Year: 2010

Circadian mating rhythms, mating frequency, mating duration, and the effect of mating duration on fecundity and fertility in the cabbage beetle, Colaphellus bowringi were investigated in the laboratory. Mating occurred throughout the 24-h cycle but the majority of copulations occurred in the photophase with two apparent peaks, one at 8:00 and another at 16:00. Mating frequency observations for 10 consecutive days indicated that pre-mating period of C. bowringi was about 4 days, and pairs mated an average of 5 times per day and an average of 40 times during the first 10 days. There was a negative correlation between mating frequency and mating duration during the consecutive mating. The mean duration of the first copulation (136.24 ± 4.62 min) was significantly longer than those of the second (57.87 ± 2.03 min), third (53.05 ± 2.05 min) and fourth copulation (30.86 ± 2.98 min). Fecundity showed a slight increase with increasing mating duration but no significant difference among treatments. However, fertility was significantly influenced by the mating duration in this species. Mating of 20-min duration did not produce viable eggs. The mean percentage of fertile eggs with completed mating duration (204.43 ± 18.96 min, 56.75% fertile eggs) was significantly higher than those with 60 min (39.55%) and 30 min (17.91%) mating duration, suggesting that the longer mating duration might be associated with transfer of more sperm that are used to increase the fertility of eggs. © 2009 The Authors Journal compilation © Institute of Zoology, Chinese Academy of Sciences.


Chen C.,Jiangxi Agricultural University | Xia Q.-W.,Jiangxi Agricultural University | Chen Y.-S.,Jiangxi Environmental Engineering Vocational College | Xiao H.-J.,Jiangxi Agricultural University | And 3 more authors.
Journal of Insect Physiology | Year: 2012

Pupae of the cotton bollworm, Helicoverpa armigera display a diapause in response to the exposure of their larvae to short photoperiods and relatively low temperatures. Due to geographic variation in photoperiodic response, moths from a northern population, Langfang (39°32'N, 116°41'E), enter diapause in response to short daylengths (D strain) while moths from a southern population, Ledong (18°28'N, 108°53'E), exhibit no diapause under the same conditions (N strain). In the present study, crosses between the two strains are utilized to evaluate the inheritance of diapause under different photoperiods at temperatures 20, 22 and 25°C. The moths in both reciprocal crosses and backcrosses to D strain showed a clear long-day response, similar to that of the D strain, suggesting that the photoperiodic response controlling diapause in this moth is heritable. The incidences of diapause for all F1 hybrids were intermediate between those of their parents. However, the incidences of diapause at 20°C in F1 (N×D) strain were significantly higher than those in F1 (D×N) strain, indicating that the male parent plays a more important role in the determination of diapause. The N strain also showed a short-day photoperiodic response at the lower temperature of 20°C, indicating that the N strain still has the capability to enter a photoperiodically induced diapause, depending on the rearing temperature. Results from all crosses under photoperiods LD 12:12 or LD 13:11 at 22°C showed that inheritance of diapause in H. armigera did not fit an additive hypothesis and that the capacity for diapause was transmitted genetically in the manner of incomplete dominance with non-diapause characteristic partially dominant over the diapausing. Diapause duration in hybrid pupae was also influenced by their inheritance from both parents. Diapause duration in hybrid pupae was intermediate between those of their parents. These results reveal that both diapause induction and duration are under the control of polygene. © 2012 Elsevier Ltd.


Xiao H.J.,Key Laboratory of Crop Physiology | Xiao H.J.,Jiangxi Agricultural University | Xiao H.J.,Virginia Polytechnic Institute and State University | Wu S.H.,Key Laboratory of Crop Physiology | And 7 more authors.
Bulletin of Entomological Research | Year: 2012

Under field conditions, the cabbage butterfly, Pieris melete, displays a pupal summer diapause in response to relatively low daily temperatures and gradually increasing day-length during spring and a pupal winter diapause in response to the progressively shorter day-length. To determine whether photoperiod is 'more' important than temperature in the determination of summer and winter diapause, or vice versa, the effects of naturally changing day-length and temperature on the initiation of summer and winter diapause were systematically investigated under field conditions for five successive years. Field results showed that the incidence of summer diapause significantly declined with the naturally increasing temperature in spring and summer generations. Path coefficient analysis showed that the effect of temperature was much greater than photoperiod in the determination of summer diapause. In autumn, the incidence of diapause was extremely low when larvae developed under gradually shortening day-length and high temperatures. The incidence of winter diapause increased to 60-90% or higher with gradually shortening day-length combined with temperatures between 20.0°C and 22.0°C. Decreasing day-length played a more important role in the determination of winter diapause induction than temperature. The eco-adaptive significance of changing day-length and temperature in the determination of summer and winter diapause was discussed. © 2011 Cambridge University Press.


Liu X.P.,Jiangxi Agricultural University | He H.M.,Jiangxi Agricultural University | Xue F.S.,Jiangxi Agricultural University | Xue F.S.,Key Laboratory of Crop Physiology
Entomologia Experimentalis et Applicata | Year: 2013

It is generally thought that females can receive more of the material benefits from males by increasing mating frequency and polyandry can lead to greater reproductive success. The cabbage beetle, Colaphellus bowringi Baly (Coleoptera: Chrysomelidae), is a highly promiscuous species, in which females or males can readily mate repeatedly with a given partner or multiple partners at a very high frequency. In the present study, the effect of mating frequency (number of matings) and mating pattern (polyandry vs. monogamy) on female reproductive fitness was investigated by measuring fecundity, fertility, and female longevity. The results indicated that increased female mating frequency with the same male did not result in variation in lifetime fecundity, but significantly increased fertility and decreased female longevity. Moreover, five copulations were sufficient to acquire maximal reproductive potential. Female lifetime fecundity also did not differ between polyandrous and monogamous treatments. However, monogamous females exhibited a significant increase in fertility and significant prolongation of longevity compared with polyandrous females, further demonstrating that monogamy is superior to polyandry in this beetle. © 2013 The Netherlands Entomological Society.


Liu X.-P.,Jiangxi Agricultural University | He H.-M.,Jiangxi Agricultural University | Xue F.-S.,Jiangxi Agricultural University | Xue F.-S.,Key Laboratory of Crop Physiology
Insect Science | Year: 2014

The influence of female age on male mating preference and reproductive success has been studied using a promiscuous cabbage beetle, Colaphellus bowringi Baly (Coleoptera: Chrysomelidae). In a simultaneous choice test, middle-aged females had significantly greater mating success than young and old females. In single pair trials, when paired with middle-aged virgin males, middle-aged females mated faster, copulated longer, and had greater fecundity and fertility than young or old females, while the longevity of males was not significantly affected by female age. This study on C. bowringi suggests that middle-aged females are more receptive to mating, which can result in the highest male reproductive success. © 2013 Institute of Zoology, Chinese Academy of Sciences.


Zhang Y.,Jiangxi Academy of Agricultural science | Zhang Y.,Key Laboratory of Crop Physiology | Mulpuri S.,ICAR Indian Institute of Oilseeds Research | Liu A.,CAS Kunming Institute of Botany
Acta Physiologiae Plantarum | Year: 2016

Defoliation occurs in castor due to several reasons, but the crop has propensity to compensate for the seed yield. Photosynthetic efficiency in terms of functional (gas exchange and chlorophyll fluorescence) and structural characteristics (photosynthetic pigment profiles and anatomical properties) of castor capsule walls under light- and dark-adapted conditions was compared with that of leaves. Capsule wall showed high intrinsic efficiency of photosystem II (Fv/Fm, 0.82) which was comparable to leaves (Fv/Fm, 0.80). With increasing photon flux densities (PFD), actual quantum yields and photochemical quenching coefficients of the capsule walls were similar to that in leaves, while electron transport rates reached a maximum corresponding to about 118 % of the leaves. However, maximum net photosynthetic rate of the capsule walls (2.60 µmol CO2 m−2 s−1) was less than one-fourth of the leaves (15.67 µmol CO2 m−2 s−1) at the CO2 concentration of 400 µmol mol−1, and the difference was attributed to about 80 % lower stomatal density and the 75 % lower total chlorophyll content of capsule walls than the leaves. Furthermore, seed weight in dark-adapted capsules was 2.70–12.42 % less as compared to the capsules developed under light. The results indicate that castor capsule walls are photosynthetically active (about 15–30 % of the leaves) and contribute significantly to carbon fixation and seed yield accounting for 10 % photoassimilates towards seed weight. © 2016, Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków.


Zhang G.,Jiangxi Science and Technology Normal University | Wen Y.,Key Laboratory of Crop Physiology | Guo C.,Jiangxi Science and Technology Normal University | Xu J.,Jiangxi Science and Technology Normal University | And 4 more authors.
Analytica Chimica Acta | Year: 2013

A highly selective and sensitive fluorescent chemosensor suitable for practical measurement of palladium ion (Pd2+) in agricultural crops and environment samples has been successfully fabricated using polybenzanthrone (PBA). PBA was facilely electrosynthesized in the mixed electrolyte of acetonitrile and boron trifluoride diethyl etherate. The fluorescence intensity of PBA showed a linear response to Pd2+ in the concentration range of 5nM-0.12mM with a detection limit of 0.277nM and quantification limit of 0.925nM. Different compounds existing in agricultural crops and environment such as common metal ions, anions, natural amino acids, carbohydrates, and organic acids were used to examine the selectivity of the as-fabricated sensor, and no obvious fluorescence change could be observed in these interferents and their mixtures. A possible mechanism was proposed that the coordination of PBA and Pd2+ enhance the aggregation of polymer chains, which led to a significant quenching of PBA emission, and this was further confirmed by absorption spectra monitoring and transmission electron microscopy. The excellent performance of the proposed sensor and satisfactory results of the Pd2+ determination in practical samples suggested that the PBA-based fluorescent sensor for the determination of Pd2+ will be a good candidate for application in agriculture and environment. © 2013 Elsevier B.V.


PubMed | Key Laboratory of Crop Physiology
Type: Journal Article | Journal: Bulletin of entomological research | Year: 2012

Under field conditions, the cabbage butterfly, Pieris melete, displays a pupal summer diapause in response to relatively low daily temperatures and gradually increasing day-length during spring and a pupal winter diapause in response to the progressively shorter day-length. To determine whether photoperiod is more important than temperature in the determination of summer and winter diapause, or vice versa, the effects of naturally changing day-length and temperature on the initiation of summer and winter diapause were systematically investigated under field conditions for five successive years. Field results showed that the incidence of summer diapause significantly declined with the naturally increasing temperature in spring and summer generations. Path coefficient analysis showed that the effect of temperature was much greater than photoperiod in the determination of summer diapause. In autumn, the incidence of diapause was extremely low when larvae developed under gradually shortening day-length and high temperatures. The incidence of winter diapause increased to 60-90% or higher with gradually shortening day-length combined with temperatures between 20.0C and 22.0C. Decreasing day-length played a more important role in the determination of winter diapause induction than temperature. The eco-adaptive significance of changing day-length and temperature in the determination of summer and winter diapause was discussed.

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