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Waterlogging reduces shoot growth and bud fruitfulness in pot‐grown grapevines with a split‐root system
Author(s) -
STEVENS R.M.,
HARVEY G.,
JOHNS R.E.
Publication year - 1999
Publication title -
australian journal of grape and wine research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.65
H-Index - 77
eISSN - 1755-0238
pISSN - 1322-7130
DOI - 10.1111/j.1755-0238.1999.tb00293.x
Subject(s) - shoot , waterlogging (archaeology) , root system , dry weight , horticulture , irrigation , biology , agronomy , dns root zone , botany , ecology , wetland
Sultana grapevines ( Vitis vinifera L. Sultana) with their root system split between two pots, a and b , were exposed to recurring cycles of waterlogging. Either none, half or the whole root system was waterlogged for the first 3 or 7 days of a 14 day irrigation cycle. Treatments were designated a 0 b 0 , a 0 b 3 , a 3 b 3 , a 0 b 7 , and a 7 b 7 , respectively where a and b refer to pots and subscripts refer to duration of waterlogging. For example, a 0 b 3 indicates that pot a remained drained, whereas pot b was waterlogged for the first 3 days in a 14 day cycle; a 7 b 7 indicates that both pots a and b were waterlogged for the first 7 days of a 14 day cycle. All material (shoots plus split roots) was harvested after 9 cycles for examination of bud anatomy and dry mass measurement. Waterlogging reduced shoot dry mass from 120 g per vine in control vines (a 0 b 0 not waterlogged) to 90 g in a 0 b 3 , 67 g in a 3 b 3 , 72 g in a 0 b 7 and 20 g in a 7 b 7 . Where entire root zones were waterlogged, root dry mass fell from 43 g per vine in a 0 b 0 to 35 g in a 3 b 3 and 17 g in a 7 b 7 . By contrast, waterlogging half the root zone had no effect on total root mass. Root mass was 45 g in a 0 b 3 and 48 g in a 0 b 7 . Waterlogging caused the shoot:root ratio to fall from 2.8 in a 0 b 0 to 1.1 in a 7 b 7 . Partial waterlogging caused a redistribution of root mass between pots a and b . Waterlogging of roots in pot b increased the mass of roots in the drained pot a . The mass of roots in pot a of a 0 b 0 was 21.8 g, a 0 b 3 30.1 g and a 0 b 7 41.7 g. Buds between nodes 1 and 12 on harvested shoots were scored for fruiting primordia. Fruitful primordia decreased from 6 out of 12 in a 0 b 0 to 5 in a 0 b 3 , 3 in a 3 b 3 and a 0 b 7 , and only 1 out of 12 in a 7 b 7 .