Organ-dependent seasonal dynamism of three forms of carbohydrates in Japanese apricot.
Organ-dependent seasonal dynamism of three forms of carbohydrates in Japanese apricot.
复制标题
日本杏中三种碳水化合物的器官依赖性季节性动态。
DOI：
10.1016/j.scienta.2015.06.023
复制
发表时间：
2015
影响因子：
4.3
通讯作者：
T.
中科院分区：
文献类型：
--
作者：
Tsuchida;Y.;Yakushiji;H.;Jomura;N.;Okamuro M.;Nakanishi;K.;Goto;F.;Yoshihara;T.
从夏季（8月;收获后2个月）到晚秋（11月;落叶前），日本杏（Prunus mumeSiebold et Zucc.）器官中可溶性糖、淀粉和细胞壁物质（CWM）三种形式碳水化合物的浓度变化。结果表明，叶片和花蕾中非结构性碳水化合物（可溶性糖和淀粉）中的13 C浓度高于当年生枝和细根，表明这些器官是碳水化合物储备的大库。但随着生长的进行，各器官的叶绿素含量沿着急剧下降，5月初各器官的叶绿素含量均较低。相反，大量的13 C被固定在老枝的CWM中。这些结果表明，储备碳水化合物有助于新梢和果实的生长，直到5月初，之后他们的生长取决于当前同化物。8 - 11月同化的碳水化合物主要分别向枝、根、干和花运输。这些发现表明，每个月吸收的碳水化合物对不同的器官有贡献。因此，叶片应保持健康，直到落叶，以产生大量的碳水化合物储备，从日本杏树稳定的果实生产。
Changes in concentration of carbohydrates in three forms—soluble sugars, starch, and cell-wall material (CWM) assimilated each month from summer (August; 2 months after harvest) to late fall (November; just before defoliation)—in organs of Japanese apricot (Prunus mumeSiebold et Zucc.) Nanko” were determined until May of the following season by providing13CO2.13C concentrations in the nonstructural carbohydrates (soluble sugar and starch) in the foliar and flower buds were higher than those in the current twigs and fine roots, suggesting that these organs are large sinks of reserve carbohydrates. However, they decreased sharply along with growth and were low in all the organs at the beginning of May. In contrast, a large amount of13C was fixed in the CWM of older twigs. These results indicate that reserve carbohydrates contribute to the growth of young shoots and fruits until the beginning of May, after which their growth depends on current assimilates. Carbohydrates assimilated in August–November were mainly transported to twigs, roots, trunk, and flowers, respectively. These findings show that carbohydrates assimilated in each month contribute to different organs. Thus, leaves should be maintained healthy until defoliation to produce substantial amounts of carbohydrate reserves for stable fruit production from Japanese apricot tree.