کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4379945 | 1303952 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mitochondrial response in the apical and lateral flower buds of the Hanfu apple to cold stress during the dormancy stage
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Mitochondrial response in the apical and lateral flower buds of the Hanfu apple to cold stress during the dormancy stage Mitochondrial response in the apical and lateral flower buds of the Hanfu apple to cold stress during the dormancy stage](/preview/png/4379945.png)
چکیده انگلیسی
In order to study the different physiological bases of cold tolerance in the apical flower buds (AFB) and the lateral flower buds (LFB) of the Hanfu apple (Malus domestica Borkh), we used 4-year-old grafted Hanfu plants as material and evaluated the physiological characteristics of mitochondria in the flower buds, such as electron transport chains (cytochrome pathway and alternative pathway), H2O2 content, mitochondrial membrane permeability transition (mPT), and MDA content. AFBs and LFBs showed different changes in total respiratory rate (Vt) during low-temperature stress, except that both reached the lowest Vts at â30 °C. The AFB Vt increased to a peak at â25 °C and decreased sharply to its minimal value at â30 °C, and then remained relatively low. In contrast, the LFB Vt decreased to its minimal value at â30 °C and increased sharply to a peak at â35 °C and then decreased again. In both AFBs and LFBs, the cytochrome pathway was still the main electron transport chain throughout the whole process, and the contributions of the cytochrome pathway (ÏVcyt/Vt) and of the alternative pathway (ÏValt/Vt) showed similar tendencies to those of Vt as temperature changed. Changes in the AFB mPT were different from those of AFB Vt. LFB mPT zigzagged from peaks at â25 °C and 35 °C. The H2O2 content of the LFBs increased from â10 °C to â30 °C, then decreased slightly from â30 °C to â35 °C, and then increased again. H2O2 content in AFBs went up steadily throughout the whole process. During the early stage of low-temperature treatment, before temperatures reached â35 °C, LFB MDA content remained relatively low and later increased. MDA content in AFBs began to increase from the beginning of treatment. It can be concluded that the higher cold tolerance of LFBs relative to AFBs could be closely related to their higher Vt and ÏValt/Vt, which may aid adaptations to stress by supplying energy and metabolic substrates under low-temperature stress conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Ecologica Sinica - Volume 33, Issue 1, February 2013, Pages 52-58
Journal: Acta Ecologica Sinica - Volume 33, Issue 1, February 2013, Pages 52-58
نویسندگان
Huaiyu Ma, Deguo Lyu, Guocheng Liu, Sijun Qin,