Global warming induces female cuttings of Populus cathayana to allocate more biomass, C and N to aboveground organs than do male cuttings
Global warming induces female cuttings of Populus cathayana to allocate more biomass, C and N to aboveground organs than do male cuttings
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全球变暖导致青杨雌性插条比雄性插条向地上器官分配更多的生物量、碳和氮
DOI：
10.1071/bt10108
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发表时间：
2010-11
影响因子：
1.1
通讯作者：
Guoquan Peng
中科院分区：
文献类型：
--
作者：
Chengchun Wu;Qingmin Han;Xiao Xu;Guoquan Peng
研究了高温处理下雌雄异株青杨（Populus cathayana）生物量积累、生物量分配以及碳（C）和氮（N）浓度的性别差异。在封闭顶部的室中，使插条经受三种温度制度（分别为对照、+2 ° C和+4 ° C）。与对照相比，增温显著提高了净光合速率、高生长量、叶干质量、茎干质量（SM）、根干质量（RM）和总干质量（TM），并导致了除雄性外的所有雌雄个体的地上/地下干质量比（AB）的增加。升温降低了雌雄插条茎中C的含量，增加了雌插条叶片中N的含量，导致雌插条叶片中C：N比低于雄插条。此外，还发现了男性和女性之间的进一步差异。在升温处理中，雌性表现出显着较高的SM，RM，TM和AB值，并降低RM：TM和RM：叶面积比没有男性。但在常温下，两性间的这些性状差异不显著。我们的研究结果表明，分配的生物量，和浓度的C和N在男性和女性的很大程度上受到温度升高，变暖的好处女性，积累和分配更多的生物量地上器官比男性。
We investigated differences between the sexes of a dioecious species, Populus cathayana Rehd, in biomass accumulation, biomass allocation, and carbon (C) and nitrogen (N) concentrations under elevated temperature treatments. Cuttings were subjected to three temperature regimes (control, +2 degrees C and +4 degrees C, respectively) in closed-top chambers. Compared with the control treatment, warming significantly increased the net photosynthesis rate, height growth, leaf dry mass, stem dry mass (SM), root dry mass (RM) and total dry mass (TM), and resulted in a higher aboveground : belowground dry mass ratio (AB) in all individuals of both sexes, except in males under the +2 degrees C warming treatment. Furthermore, warming decreased the concentration of C in the stems in both sexes, and increased the concentration of N in the leaves of females, and consequently, resulted in a lower C : N ratio in the leaves of female cuttings than in those of male cuttings. Also, further differences between males and females were detected. In the warming treatments, females exhibited significantly higher values of SM, RM, TM and AB, and lower RM : TM and RM : foliage area ratios than did the males. However, no significant differences in these traits between the two sexes were detected under ambient temperature. Our results indicated that allocation of biomass, and the concentrations of C and N in males and females are greatly affected by an elevated temperature, and that warming benefits females, which accumulate and allocate more biomass to aboveground organs than do the males.
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影响因子：
5.7
作者：
De Chen;M. Coughenour;Debra R. Eberts;J. Thullen
通讯作者：
De Chen;M. Coughenour;Debra R. Eberts;J. Thullen
影响因子：
4
作者：
Li, Chunyang;Xu, Gang;Berninger, Frank
通讯作者：
Berninger, Frank
影响因子：
2.7
作者：
DAWSON, TE;BLISS, LC
通讯作者：
BLISS, LC
影响因子：
4
作者：
Domisch, T;Finér, L;Lehto, T
通讯作者：
Lehto, T
影响因子：
11.6
作者：
D. Tingey;R. McKane;D. Olszyk;Mark G. Johnson;P. Rygiewicz;E. Henry Lee
通讯作者：
D. Tingey;R. McKane;D. Olszyk;Mark G. Johnson;P. Rygiewicz;E. Henry Lee