Pistachio Salinity Studies
University of California
Pistachio Salinity Studies

The Data: Plant Response

Injury to leaf margins
Injury to leaf margins
Leaf Injury

Marginal leaf yellowing was first observed in June on one tree in the low salinity treatment containing B, and within 30 days trees in all the treatments showed this leaf injury. injury tended to occur on the proximal sections of the branches with older leaves, while leaves on the distal ends appeared healthy. Stem tissue did not appear to be affected. Boron analysis confirmed that this leaf injury was due to boron toxicity.

Influence of Salinity on Growth

We measured a growth parameter called 'trunk diameter increase' which is the growth in scion trunk diameter from initial bud stage to the conclusion of the study. This parameter decreased with increasing salinity treatment. A similar trend was observed in measurement of other growth parameters: canopy height, which is an indication of scaffold length, total leaf area, and total leaf weight (Tables 1 & 2 below). However, these effects were not significant until EC levels reached 12 dS/m.

Data Summary: Growth Parameters

Trunk Diameter Increase (mm)

Trmt EC
(dS/m)
P. atlantica P. integerrima UCB-1
1 3.5 6.2 a 4.5 a 7.6 a
2 8.7 5.8 a 5.0 a 6.9 a
3 12 6.8 a 4.0 a 5.6 ab
4 16 3.3 b 1.1 b 4.4 b

Canopy Height (cm)

Trmt EC
(dS/m)
P. atlantica P. integerrima UCB-1
1 3.5 164 a 167 a 151 ab
2 8.7 160 a 168 a 165 a
3 12 173 a 120 b 132 ab
4 16 119 b 107 b 126 b

Table 1. Trunk diameter increase and canopy height of Kerman scion on three rootstocks,
as influenced by salinity irrigation treatment.

Leaf Parameters

Total Leaf Weight (g)

Trmt EC
(dS/m)
Pistacia atlantica Pistacia integerrima UCB-1
1
3.5 126  a 161 a 149 a
2 8.7 126  a 116 ab 153 a
3 12 113  a 79 bc 108 a
4 16 48 b 36 c 57 b

Total Leaf Area (cm2/tree)

Trmt EC
(dS/m)
Pistacia atlantica Pistacia integerrima UCB-1
1 3.5 5270 a 7061 ab 6620 a
2 8.7 5761 a 7991 a
6991 a
3 12 5489 a 4252 bc 4536ab
4 16 2107 b 1194  c 2107 b

Table 2. Leaf weight & area of Kerman scion on three rootstocks, as influenced by salinity irrigation treatment.

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