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Male poplars have a stronger ability to balance growth and carbohydrate accumulation than do females in response to a short-term potassium deficiency.

Identifieur interne : 001C60 ( Main/Exploration ); précédent : 001C59; suivant : 001C61

Male poplars have a stronger ability to balance growth and carbohydrate accumulation than do females in response to a short-term potassium deficiency.

Auteurs : Yanni Yang [République populaire de Chine] ; Hao Jiang [République populaire de Chine] ; Maolin Wang [République populaire de Chine] ; Helena Korpelainen [Finlande] ; Chunyang Li [République populaire de Chine]

Source :

RBID : pubmed:25615581

Descripteurs français

English descriptors

Abstract

Potassium (K) deficiency influences plant performance, such as ion uptake and carbohydrate transport. However, little is known about differences between males and females in response to K deficiency. In this study, dry matter accumulation, photosynthetic capacity, allocation patterns of K(+) , Na(+) and carbohydrates, and ultrastructural changes in males and females of Populus cathayana exposed to K deficiency were investigated. The results indicated that males maintained a significantly higher K(+) content and K(+) /Na(+) ratio in leaves and stems than did females under K deficiency. Moreover, K deficiency significantly increased the sucrose content of females, whereas no significant effect on males was detected. In addition, a comparative analysis showed that males allocated more resources to roots, while females allocated more to leaves, which resulted in sexually different root/shoot (R/S) ratios. Transmission electron microscopic (TEM) observations showed that males suffered fewer injuries than did females. These results suggested that males have a better ability to cope with K deficiency. In addition, the combined effects of salinity and K deficiency on poplars were studied. The results indicated that salt stress aggravates the negative effects caused by K deficiency. Taken together, our study provided evidence for gender-specific strategies in ion and carbohydrate allocation in poplars exposed to a short-term K deficiency. In leaves and stems, the lower K(+) accumulation inhibited sucrose translocation and resulted in a decreased R/S ratio, which may contribute to males having a stronger ability to balance growth and carbohydrate accumulation when compared with females.

DOI: 10.1111/ppl.12325
PubMed: 25615581


Affiliations:


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Le document en format XML

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<div type="abstract" xml:lang="en">Potassium (K) deficiency influences plant performance, such as ion uptake and carbohydrate transport. However, little is known about differences between males and females in response to K deficiency. In this study, dry matter accumulation, photosynthetic capacity, allocation patterns of K(+) , Na(+) and carbohydrates, and ultrastructural changes in males and females of Populus cathayana exposed to K deficiency were investigated. The results indicated that males maintained a significantly higher K(+) content and K(+) /Na(+) ratio in leaves and stems than did females under K deficiency. Moreover, K deficiency significantly increased the sucrose content of females, whereas no significant effect on males was detected. In addition, a comparative analysis showed that males allocated more resources to roots, while females allocated more to leaves, which resulted in sexually different root/shoot (R/S) ratios. Transmission electron microscopic (TEM) observations showed that males suffered fewer injuries than did females. These results suggested that males have a better ability to cope with K deficiency. In addition, the combined effects of salinity and K deficiency on poplars were studied. The results indicated that salt stress aggravates the negative effects caused by K deficiency. Taken together, our study provided evidence for gender-specific strategies in ion and carbohydrate allocation in poplars exposed to a short-term K deficiency. In leaves and stems, the lower K(+) accumulation inhibited sucrose translocation and resulted in a decreased R/S ratio, which may contribute to males having a stronger ability to balance growth and carbohydrate accumulation when compared with females. </div>
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<ArticleId IdType="doi">10.1111/ppl.12325</ArticleId>
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<li>Finlande</li>
<li>République populaire de Chine</li>
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<li>Uusimaa</li>
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<li>Helsinki</li>
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<li>Université d'Helsinki</li>
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<name sortKey="Yang, Yanni" sort="Yang, Yanni" uniqKey="Yang Y" first="Yanni" last="Yang">Yanni Yang</name>
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<name sortKey="Jiang, Hao" sort="Jiang, Hao" uniqKey="Jiang H" first="Hao" last="Jiang">Hao Jiang</name>
<name sortKey="Li, Chunyang" sort="Li, Chunyang" uniqKey="Li C" first="Chunyang" last="Li">Chunyang Li</name>
<name sortKey="Wang, Maolin" sort="Wang, Maolin" uniqKey="Wang M" first="Maolin" last="Wang">Maolin Wang</name>
<name sortKey="Yang, Yanni" sort="Yang, Yanni" uniqKey="Yang Y" first="Yanni" last="Yang">Yanni Yang</name>
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<name sortKey="Korpelainen, Helena" sort="Korpelainen, Helena" uniqKey="Korpelainen H" first="Helena" last="Korpelainen">Helena Korpelainen</name>
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