Congressi Nazionali SISEF

*

Presentazione orale

Scartazza A, Proietti S, Moscatello S, Augusti A, Monteverdi M C, Brugnoli E, Battistelli A

Influenza della siccità estiva sull’accrescimento primaverile in Juglans regia L.

Riassunto: Two-years-old Juglans regia L. (cv. Lozeronne) seedlings were subjected to drought from August to the end of the growing season. Water potential, photosynthesis, growth and storage carbohydrates accumulation were monitored during the season. Photosynthesis rate was decreased significantly in drought-stressed plants, compared to fully-irrigated controls. Although stomatal conductance was greatly reduced by drought, a clear non-stomatal component of the photosynthetic limitation was evident from Api curves. Stem collar diametral growth was inhibited soon after the onset of the drought period. Soluble carbohydrates and starch contents were determined during the growing season in leaves, bark and wood of roots and stems. At the end of the vegetative season, drought-stressed plants showed a strong reduction in storage carbohydrate content, compared to fully-irrigated controls. Carbon isotope composition of carbohydrates, extracted from different plant organs at the end of the vegetative season, was affected by drought depending on the organ analysed. Late summer drought strongly affected growth characteristics and carbon isotope composition of the new shoots produced in the next spring growth. Particularly, carbon isotope composition of the new shoots, sampled during the early stages of growth, reflected the isotope composition of starch accumulated during the drought period in the previous vegetative season. Growth rate of shoots and stem collar diameter was reduced in plants subjected to drought in the previous year. Growth rate was correlated with the storage carbohydrate contents measured at the onset of the new vegetative season.

Citazione: Scartazza A, Proietti S, Moscatello S, Augusti A, Monteverdi M C, Brugnoli E, Battistelli A (1999). Influenza della siccità estiva sull’accrescimento primaverile in Juglans regia L.. In: II Congresso Nazionale SISEF “Applicazioni e prospettive per la ricerca forestale italiana“ (Centro Fieristico, Bologna 20-22 Ottobre 1999), Abstract-book, Contributo #c02.3.8. - [online] URL: https://congressi.sisef.org/?action=paper&id=1118


Dettagli

Congresso II Congresso Nazionale SISEF
“Applicazioni e prospettive per la ricerca forestale italiana”
Centro Fieristico, Bologna 20-22 Ottobre 1999
Collocazione c02.3.8 (#)
Sessione Sessione 03
Moderatore/i Emilio Amorini
Data Oct 21, 1999
Ora 15:00-17:45
Luogo -
Info Autori
(*): speaker

A Scartazza*
Istituto per l’Agroselvicoltura CNR Via Marconi 2, 05010 Porano (TR)
Italy

S Proietti
Istituto per l’Agroselvicoltura CNR Via Marconi 2, 05010 Porano (TR)
Italy

S Moscatello
Istituto per l’Agroselvicoltura CNR Via Marconi 2, 05010 Porano (TR)
Italy

A Augusti
Istituto per l’Agroselvicoltura CNR Via Marconi 2, 05010 Porano (TR)
Italy

C Monteverdi M
Istituto per l’Agroselvicoltura CNR Via Marconi 2, 05010 Porano (TR)
Italy

E Brugnoli
Istituto per l’Agroselvicoltura CNR Via Marconi 2, 05010 Porano (TR)
Italy

A Battistelli
Istituto per l’Agroselvicoltura CNR Via Marconi 2, 05010 Porano (TR)
Italy