תפריט נגישות
ניגודיות עדינהניגודיות גבוהה
מונוכרום
הדגשת קישורים
חסימת אנימציה
פונט קריא
סגור
איפוס הגדרות נגישות
להורדת מודול נגישות חינם תפריט נגישותניגודיות עדינהניגודיות גבוההמונוכרוםהדגשת קישוריםחסימת אנימציהפונט קריאסגוראיפוס הגדרות נגישותלהורדת מודול נגישות חינםZvi Duman - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel; The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel.
Gal Hadas-Brandwein - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel; The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel. .
Avi Eliyahu - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel; The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel..
Eduard Belausov - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel.
Mohamad Abu-Abied - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel.
Yelena Yeselson - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel.
Adi Faigenboim - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel.
Amnon Lichter - The Institute of Post Harvest and Food Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel.
Vered Irihimovitch - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel.
Einat Sadot - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel.
Dark-grown (etiolated) branches of many recalcitrant plant species root better than their green counterparts. Here it was hypothesized that changes in cell-wall properties and hormones occurring during etiolation contribute to rooting efficiency. Measurements of chlorophyll, carbohydrate and auxin contents, as well as tissue compression, histological analysis and gene-expression profiles were determined in etiolated and de-etiolated branches of the avocado rootstock VC801. Differences in chlorophyll content and tissue rigidity, and changes in xyloglucan and pectin in cambium and parenchyma cells were found. Interestingly, lignin and sugar contents were similar, suggesting that de-etiolated branches resemble the etiolated ones in this respect. Surprisingly, the branches that underwent short de-etiolation rooted better than the etiolated ones, and only a slight difference in IAA content between the two was observed. Gene-expression profiles revealed an increase in ethylene-responsive transcripts in the etiolated branches, which correlated with enrichment in xyloglucan hydrolases. In contrast, transcripts encoding pectin methylesterase and pectolyases were enriched in the de-etiolated branches. Taken together, it seems that the short de-etiolation period led to fine tuning of the conditions favoring adventitious root formation in terms of auxin-ethylene balance and cell-wall properties.
Zvi Duman - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel; The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel.
Gal Hadas-Brandwein - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel; The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel. .
Avi Eliyahu - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel; The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel..
Eduard Belausov - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel.
Mohamad Abu-Abied - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel.
Yelena Yeselson - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel.
Adi Faigenboim - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel.
Amnon Lichter - The Institute of Post Harvest and Food Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel.
Vered Irihimovitch - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel.
Einat Sadot - The Institute of Plant Sciences, The Volcani Center, ARO, 68 HaMaccabim Road, Rishon LeZion 7528809, Israel.
Dark-grown (etiolated) branches of many recalcitrant plant species root better than their green counterparts. Here it was hypothesized that changes in cell-wall properties and hormones occurring during etiolation contribute to rooting efficiency. Measurements of chlorophyll, carbohydrate and auxin contents, as well as tissue compression, histological analysis and gene-expression profiles were determined in etiolated and de-etiolated branches of the avocado rootstock VC801. Differences in chlorophyll content and tissue rigidity, and changes in xyloglucan and pectin in cambium and parenchyma cells were found. Interestingly, lignin and sugar contents were similar, suggesting that de-etiolated branches resemble the etiolated ones in this respect. Surprisingly, the branches that underwent short de-etiolation rooted better than the etiolated ones, and only a slight difference in IAA content between the two was observed. Gene-expression profiles revealed an increase in ethylene-responsive transcripts in the etiolated branches, which correlated with enrichment in xyloglucan hydrolases. In contrast, transcripts encoding pectin methylesterase and pectolyases were enriched in the de-etiolated branches. Taken together, it seems that the short de-etiolation period led to fine tuning of the conditions favoring adventitious root formation in terms of auxin-ethylene balance and cell-wall properties.
