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Cuticular waxes in alpine meadow plants: climate effect inferred from latitude gradient in Qinghai-Tibetan Plateau.

Guo Y, Guo N, He Y, Gao J - Ecol Evol (2015)

Bottom Line: The average chain length of n-alkanes in both plant and soil linearly increased with increased temperature, whereas reduced with increased aridity index.No significant correlation could be observed between mean annual precipitation and mean precipitation from June to August and the cuticular wax amounts and average chain length.Our results suggest that the survival of some alpine plants in specific environments might be depended on their abilities in adjusting wax deposition on plant leaves, and the alpine meadow plants as a whole respond to climate change, benefiting the stability of alpine meadow ecosystem.

View Article: PubMed Central - PubMed

Affiliation: College of Agronomy and Biotechnology Southwest University Chongqing 400716 China.

ABSTRACT
Alpine meadow ecosystems are susceptible to climate changes. Still, climate impact on cuticular wax in alpine meadow plants is poorly understood. Assessing the variations of cuticular wax in alpine meadow plants across different latitudes might be useful for predicting how they may respond to climate change. We studied nine alpine meadows in a climate gradient in the east side of Qinghai-Tibetan Plateau, with mean annual temperature ranging from -7.7 to 3.2°C. In total, 42 plant species were analyzed for cuticular wax, averaged 16 plant species in each meadow. Only four plant species could be observed in all sampling meadows, including Kobresia humilis,Potentilla nivea,Anaphalis lacteal, and Leontopodium nanum. The amounts of wax compositions and total cuticular wax in the four plant species varied among sampling meadows, but no significant correlation could be observed between them and temperature, precipitation, and aridity index based on plant species level. To analyze the variations of cuticular wax on community level, we averaged the amounts of n-alkanes, aliphatic acids, primary alcohols, and total cuticular wax across all investigated plant species in each sampling site. The mean annual temperature, mean temperature in July, and aridity index were significantly correlated with the averaged amounts of wax compositions and total cuticular wax. The average chain length of n-alkanes in both plant and soil linearly increased with increased temperature, whereas reduced with increased aridity index. No significant correlation could be observed between mean annual precipitation and mean precipitation from June to August and the cuticular wax amounts and average chain length. Our results suggest that the survival of some alpine plants in specific environments might be depended on their abilities in adjusting wax deposition on plant leaves, and the alpine meadow plants as a whole respond to climate change, benefiting the stability of alpine meadow ecosystem.

No MeSH data available.


Relationship between aridity index and the amounts of n‐alkanes, aliphatic acids, primary alcohols, and total cuticular wax across plants in alpine meadows along latitude gradients.
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ece31677-fig-0005: Relationship between aridity index and the amounts of n‐alkanes, aliphatic acids, primary alcohols, and total cuticular wax across plants in alpine meadows along latitude gradients.

Mentions: In total, 42 plant species were analyzed for cuticular wax, averaged 16 plant species in each sampling area (Table S1). To analyze the variations of cuticular wax on community level, we averaged the amounts of n‐alkanes, aliphatic acids, primary alcohols, and total cuticular wax across all investigated plant species in each sampling site. Regression analysis indicated that the estimated mean annual temperature and mean temperature in July were significantly correlated with the averaged amounts of n‐alkanes, aliphatic acids, primary alcohols, and total cuticular wax, except for insignificant relationship between mean temperature in July and total cuticular wax amounts (Fig. 3). Overall, the amounts of n‐alkanes and primary alcohols reduced, whereas the amount of aliphatic acids rose with increased temperatures. The amount of total cuticular wax reduced first and then increased. There existed no significant relationship between mean annual precipitation and mean precipitation from June to August and the amounts of cuticular wax compositions except for n‐alkane (Fig. 4). The amounts of n‐alkanes and primary alcohols linearly increased, whereas the amount of acids decreased with increased aridity index (Fig. 5). No relationship was observed between total cuticular wax amounts and aridity index.


Cuticular waxes in alpine meadow plants: climate effect inferred from latitude gradient in Qinghai-Tibetan Plateau.

Guo Y, Guo N, He Y, Gao J - Ecol Evol (2015)

Relationship between aridity index and the amounts of n‐alkanes, aliphatic acids, primary alcohols, and total cuticular wax across plants in alpine meadows along latitude gradients.
© Copyright Policy - creativeCommonsBy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4588662&req=5

ece31677-fig-0005: Relationship between aridity index and the amounts of n‐alkanes, aliphatic acids, primary alcohols, and total cuticular wax across plants in alpine meadows along latitude gradients.
Mentions: In total, 42 plant species were analyzed for cuticular wax, averaged 16 plant species in each sampling area (Table S1). To analyze the variations of cuticular wax on community level, we averaged the amounts of n‐alkanes, aliphatic acids, primary alcohols, and total cuticular wax across all investigated plant species in each sampling site. Regression analysis indicated that the estimated mean annual temperature and mean temperature in July were significantly correlated with the averaged amounts of n‐alkanes, aliphatic acids, primary alcohols, and total cuticular wax, except for insignificant relationship between mean temperature in July and total cuticular wax amounts (Fig. 3). Overall, the amounts of n‐alkanes and primary alcohols reduced, whereas the amount of aliphatic acids rose with increased temperatures. The amount of total cuticular wax reduced first and then increased. There existed no significant relationship between mean annual precipitation and mean precipitation from June to August and the amounts of cuticular wax compositions except for n‐alkane (Fig. 4). The amounts of n‐alkanes and primary alcohols linearly increased, whereas the amount of acids decreased with increased aridity index (Fig. 5). No relationship was observed between total cuticular wax amounts and aridity index.

Bottom Line: The average chain length of n-alkanes in both plant and soil linearly increased with increased temperature, whereas reduced with increased aridity index.No significant correlation could be observed between mean annual precipitation and mean precipitation from June to August and the cuticular wax amounts and average chain length.Our results suggest that the survival of some alpine plants in specific environments might be depended on their abilities in adjusting wax deposition on plant leaves, and the alpine meadow plants as a whole respond to climate change, benefiting the stability of alpine meadow ecosystem.

View Article: PubMed Central - PubMed

Affiliation: College of Agronomy and Biotechnology Southwest University Chongqing 400716 China.

ABSTRACT
Alpine meadow ecosystems are susceptible to climate changes. Still, climate impact on cuticular wax in alpine meadow plants is poorly understood. Assessing the variations of cuticular wax in alpine meadow plants across different latitudes might be useful for predicting how they may respond to climate change. We studied nine alpine meadows in a climate gradient in the east side of Qinghai-Tibetan Plateau, with mean annual temperature ranging from -7.7 to 3.2°C. In total, 42 plant species were analyzed for cuticular wax, averaged 16 plant species in each meadow. Only four plant species could be observed in all sampling meadows, including Kobresia humilis,Potentilla nivea,Anaphalis lacteal, and Leontopodium nanum. The amounts of wax compositions and total cuticular wax in the four plant species varied among sampling meadows, but no significant correlation could be observed between them and temperature, precipitation, and aridity index based on plant species level. To analyze the variations of cuticular wax on community level, we averaged the amounts of n-alkanes, aliphatic acids, primary alcohols, and total cuticular wax across all investigated plant species in each sampling site. The mean annual temperature, mean temperature in July, and aridity index were significantly correlated with the averaged amounts of wax compositions and total cuticular wax. The average chain length of n-alkanes in both plant and soil linearly increased with increased temperature, whereas reduced with increased aridity index. No significant correlation could be observed between mean annual precipitation and mean precipitation from June to August and the cuticular wax amounts and average chain length. Our results suggest that the survival of some alpine plants in specific environments might be depended on their abilities in adjusting wax deposition on plant leaves, and the alpine meadow plants as a whole respond to climate change, benefiting the stability of alpine meadow ecosystem.

No MeSH data available.